Could a tell-all book derail a 1D reunion?

Zayn Malik is ready to burn his last bridge back to One Direction — by writing a tell-all book about his time with the group.

According to London’s Daily Mail, Zayn, who left 1-D a few months before the lads went on “hiatus,” has signed a deal to spill the beans about the band. A source close to the singer tells the paper, “This book is going to be explosive, and Simon Cowell will be furious with Zayn and may even try to stop it coming out. Zayn is determined to reveal the secrets behind the clean image that was always so fiercely protected by the band’s publicity machine.”