Thirty-five years ago, a gangly 22-year-old named Declan MacManus quit his job in a London lipstick factory and adopted the stage name Elvis Costello.

Stiff Records was about to release his debut LP, “My Aim Is True,” and had signed him to a contract that could support his wife and young son. With the windfall, Costello bought back the copy of “A Hard Day’s Night” that he’d pawned to afford the previous month’s gas bill.

Costello has never been overly forthcoming about his personal life, so it might be surprising to hear that he divulged this humanizing anecdote, and many others, in one of the best rock-star memoirs of the last decade.

His story is more music-oriented than Patti Smith’s “Just Kids,” less self-aggrandizing than Keith Richards’ “Life,” and more revealing than “Chronicles, Volume 1” by Bob Dylan.

Unlike those books, Costello’s memoir hasn’t won any awards or appeared on any best-seller lists – fact is, it doesn’t even have a title or a publisher.

But between 2001 and 2006, Costello authored 17 long reflective essays to accompany Rhino Records’ full reissue of his 1977-96 catalog. These reminiscences add up to more than 60,000 words – longer than “The Great Gatsby” – and they provide the only intimate firsthand look at one of the most written-about pop careers of all time.

But good luck finding them. After the Rhino reissue series, Universal Music bought the rights to Costello’s first decade of recordings and reissued them yet again, essay-free, under their Hip-O Select label.

Rhino has since stopped releasing even the other ’80s and ’90s records that included Costello’s writings; if you want to own them now, you’ll have to find used copies or pay anywhere from $30 to $80 for new ones on Amazon. (Alternatively, you can read typo-riddled transcriptions of some of the essays on the Elvis Costello wiki.)

You’d think that Costello, who according to his management now owns the rights to the essays, would be keen to publish them for a broader audience. (He denied Slate’s request to run an excerpt to accompany this article.) After all, musician memoirs have become big business since he wrote his.

Books by Eric Clapton, Gil Scott-Heron, Jay-Z and Bob Mould have been covered as cultural events, just as Neil Young’s “Waging Heavy Peace” promises to be when it arrives this fall.

And certainly Costello’s career choices have been inscrutable enough to warrant explanation. The memoir-in-CD-booklets engagingly chronicles Costello’s evolution from cantankerous young man to irrepressible middle-aged gadfly and collaborator.

Now in his 50s, Costello is an improbable ambassador for big band jazz, New Orleans funk, American roots and Gershwin-indebted orchestral music, to name only a few of the styles he’s indulged over the last decade.

But the liner notes remind the reader that Costello’s tastes and ambitions extended beyond rock from the beginning. Remembering the songwriting process for “My Aim Is True,” he recalls the mix of influences he stirred into one of his best songs:

“I spent a lot of time with just a big jar of instant coffee and the first Clash album, listening to it over and over. By the time I got down to the last few grains, I had written ‘Watching the Detectives.’ The chorus had these darting figures that I wanted to sound like something from a Bernard Herrmann score.”

Costello pays heed to the required arc of the rock star memoir, though the limited space available to him prevents wallowing in backstage excesses.

“I surrendered to temptation, committed selfish acts of betrayal, and destroyed any possibility of trust and reconciliation in my marriage,” he admits of his heavy-touring days following 1979’s “Armed Forces.” “I was as normal as any young idiot suddenly thrust into the charts and onto the cover of periodicals while being spoken about with exaggerated awe.”

But he avoids self-pity, writing, “If I seemed a little self-absorbed at the time, then I have to say that much duller songs have been written on the subject.”

Amid all the pill-popping and excessive drinking, Costello found solace in relatively “duller” styles than his own vengeful proto-New Wave. In 1980, he released “Get Happy!!,” 20 songs in the manner of Stax/Volt soul, then followed it in 1981 with a country covers album, “Almost Blue.”

In the essay for that album, Costello explains that his first couple years as a pop star had been so personally and professionally exhausting that he craved a break from his own head.

“I had developed the notion that I might better express my feelings through other people’s words and music,” he writes. “Country ballads suited my blue mood most of all.”

Costello’s mood has ebbed and flowed though generally improved since that time, but he’s never lost the desire to wear whatever stylistic hat suits his current whims. In the essay for “King of America,” his first album cut largely with session musicians (including a few who played in the original Elvis’ band), Costello explains why this mid-career shift into troubadour mode was so liberating:

“During my visits to Hollywood, I found myself sitting around hotel rooms late at night with other songwriters, drinking and swapping stories and songs. This was entirely new to someone who had started out in the rather more insular and competitive London scene. I would meet a lot of interesting characters in ‘King of America’ producer T-Bone Burnett’s company over the next few years, including Jerry Lee Lewis, Willie Dixon, Harry Dean Stanton, Kris Kristofferson and Lucinda Williams.”

There’s a long and well-documented history of English musicians fleeing gray Britain for America. What differentiates Costello is the great leap he made to incorporate those genres into his own music, against expectations. “This Year’s Model” and “Armed Forces,” his first records with his rampaging band the Attractions, were quintessentially British, full of amphetamine-boosted tempos, rancorous class politics and eloquent wordplay.

But the success of songs like “Pump It Up” and “(What’s So Funny ’Bout) Peace, Love and Understanding?” seems to have activated Costello’s paranoid streak, sending him running, Dylan-like, for anything other than what audiences expected of him.

Writing about his 1993 collaboration with the classical-minded Brodsky Quartet, “The Juliet Letters,” Costello recalls critics who accused him of suddenly straining for artistic respectability:

“Clearly anyone who made such a statement had little or no knowledge of the critical hyperbole that can rain down on even the slightest talent before the bloom goes off the romance in pop music. I had found myself being taken too seriously and over-analyzed from the very outset of my recording career.”

“All This Useless Beauty,” Costello’s last record with the Attractions, was released in 1996 and reissued by Rhino in 2001. It’s a mature and ruminative album, full of songs that Costello had written either for or with other artists.

“None of these lyrics contained any anger toward the characters,” he writes, “only disappointment that they had settled for so little. I could just as easily have been talking to myself.”

Though he leaves the source of his self-disappointment unspecified, Costello hasn’t approached this kind of frankness in any interview or writing I’ve seen elsewhere. It’s particularly startling given that he was only five years removed from the record in question. But by then he had already inaugurated the obsessively dilettantish approach that has distinguished his post-Attractions career.

Since 1996, Costello has appeared intent on leaving no creative opportunity untaken, whether hosting a talk show on basic cable or releasing a symphony, “Il Sogno,” in 2004.

It’s a career path that has put all but the most devoted fans off his scent, though the Costello revealed in these mini-memoirs is both more humble and more expressive than some disappointed fans might think him to be after the last 15 years.

Whatever the merits of his recent albums (and a few are quite good indeed), he has come to embody a searching and catholic kind of musical fandom that only seems more appropriate now, when seemingly all of recorded history is available to anyone with an Internet connection.

Most musician memoirs are an indulgence for author and reader alike, but Costello’s is the rare one that actually conveys the musical mind and shows how complex and generous it can be.

Even if, like me, you’ve listened to 1982’s “Imperial Bedroom” countless times and admired the Attractions’ melding of styles over its 15 songs, it’s still stunning to read the tangle of allusions that Costello unravels in his essay.

He explains that his listening habits at the time included Billie Holiday and Frank Sinatra, Erik Satie and Debussy, Miles Davis and the Left Banke.

“Now as an adult,” he writes, “there was certainly something attractive about the way these records felt out of step with fashion and had a connection to so many musical threads.”

That’s Costello’s late career in a sentence: chasing musical connections no matter how far afield of fashion they lead him. No wonder he took half a decade to write his memoirs – and then let them escape with a shrug.