He’s the mystery man who’s a key figure in the sexual assault allegations against U.S. Supreme Court nominee Brett Kavanaugh, and for $600, you can now learn some of his innermost thoughts. Or you can pay $1,999 for the hardcover of his book “Wasted: Tales of a Gen X Drunk.”

Memoirs by Kavanaugh’s high-school friend Mark Judge have skyrocketed in price following last week’s emotional hearing, where Christine Blasey Ford described Kavanaugh allegedly sexually assaulting her at a party when they were teens. At the hearing, Kavanaugh tearfully maintained his innocence.

Blasey Ford said Judge was in the room when the assault happened, but Judge didn’t testify at the hearing.

People who want a glimpse into Judge and his past as a hard-drinking student can find it in his writings. Used copies of Judge’s memoir, “God and Man at Georgetown Prep: How I Became a Catholic Despite 20 Years of Catholic Schooling,” were selling for up to $784 on Amazon on Monday, up from $200 the day after the hearing.

Another Judge book — “A Tremor of Bliss: Sex, Catholicism and Rock ‘n’ Roll” — was listed at $252 on the used book marketplace Alibris on Monday. In that book, Judge detailed “his personal journey from the playgrounds of the sexual revolution to his eventual belief in the need to combine sexuality with love and commitment,” according to a description on the site.

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Bids for “Wasted: Tales of a Gen X Drunk” started at $88 on eBay the day after the hearing and were up to $221 on Monday. That memoir details the period when Kavanaugh allegedly assaulted Blasey Ford, and describes how Judge worked at a local grocery store, the Huffington Post reported. Blasey Ford testified that she ran into Judge at a Potomac, Md. Safeway supermarket weeks after the alleged assault.

Books by Mark Judge, a high-school friend of Supreme Court nominee Brett Kavanaugh, have shot up in price. Hazelden, Doubleday Religion, The Crossroad Publishing Company

In the “Wasted” book, Judge wrote about someone named “Barthold” Kavanaugh vomiting in a car and passing out, said Vermont Democrat Patrick Leahy at Thursday’s hearing. Kavanaugh maintained that the book was a “fictionalized account.” Leahy asked Kavanaugh, “I’m trying to get a straight answer from you under oath. Are you Bart Kavanaugh that he’s referring to, yes or no?” Kavanaugh responded, “You’d have to ask him.”

Blasey Ford testified that Judge was just a few feet away when Kavanaugh allegedly groped her, pinned her to a bed and put his hand over her mouth to prevent her from screaming. Kavanaugh described Judge as a funny and popular friend of his at the elite all-boys school Georgetown Prep.

While curiosity has surrounded Judge, the public has heard little from him. Judge has said he will cooperate with the FBI investigation that’s now probing some of the allegations against Kavanaugh. If confirmed to the highest judicial office in the land, Kavanaugh is expected to tip the Supreme Court to the right.

In a letter submitted to the Senate Judiciary Committee on the day of the hearing, Judge said he did “not recall the events” that Blasey Ford detailed in her testimony. He added that he does not want to comment about Blasey Ford’s allegation publicly. “As a recovering alcoholic and a cancer survivor, I have struggled with depression and anxiety. As a result, I avoid public speaking,” he said in a statement through his lawyer.

Blasey Ford says that Judge was in the room when Kavanaugh allegedly assaulted her. “Mark seemed ambivalent, at times urging Brett on and at times telling him to stop,” Blasey Ford told the Senate Judiciary Committee. “A couple of times, I made eye contact with Mark and thought he might try to help me, but he did not.”

Kavanaugh testified that Judge had “suffered tremendously” from a “serious addiction problem” that had nearly killed him twice.