Manhattan District Attorney Alvin Bragg wants to review the manuscript of a forthcoming book by former staff member Mark Pomerantz—to be sure the work doesn’t compromise their ongoing investigation into former President Donald Trump.

In a letter sent Wednesday by DANY general counsel Leslie Dubeck to Simon & Schuster, the office claimed Pomerantz failed to get permission to pen the book, called “People vs. Donald Trump, An Inside Account.”