The subject of the bestselling “The Boy Who Came Back From Heaven,” who had the book withdrawn, claiming it was fiction, is suing the publisher for using his name as a co-author without his permission.

The dispute between William Alexander Malarkey, 20, and Tyndale House is over the profits from the book, which reportedly sold more than a million copies.

The book purported to tell of Alex’s experience while in a coma for two months after a car accident when he was 6 years old that left him a quadriplegic.

The complaint was filed in the DuPage County Circuit Court in Illinois, just outside of Chicago, where the publisher is located.

It seeks damages for defamation, deceptive trade practices and violating a state law protecting disabled persons from financial exploitation.

The suit claims the publishing house used a manuscript submitted by Alex Malarkey’s now-estranged father, Kevin Malarkey, assigned Alex authorship and cashed in.

The publishing