John Mulaney's ex-wife is dropping a new memoir in the near future -- and while some think she's gonna torch John over their uncoupling ... those folks are s*** outta luck.

Here's the deal ... Anna Marie Tendler -- who was married to the comedian for 7 years before things fell apart and they divorced in 2021 -- announced this week that she's got a book coming out later this summer, and it's called 'Men Have Called Her Crazy.'

The title in and of itself seems to suggest she'll go to town on some dudes in her life -- and her caption seemed to further fuel that notion. She wrote, "I have been writing this book for two years. More accurately though I have been writing it for close to four decades."

AMT adds, "I have never been more proud of any work. It is a story about mental health; about being a woman; about family. And finally, about the endless source of my heartbreak and rage -- men."

Of course, people in her comments think she's bull-horning her intentions ... namely, taking John to task over what some characterize as a messy divorce, which Anna has said left her heartbroken. John started dating Olivia Munn shortly thereafter, and had a kid with her too.

John caught some flak over all this at the time -- and now, Anna seems primed to speak about it all. Here's the thing though ... we know for a fact she absolutely won't.

Sources with direct knowledge -- who've already read Anna's memoir -- tell TMZ that John is never mentioned in her forthcoming offering ... either directly or indirectly.

Not only are we told that he isn't named in the book, but there's no alluding to him or their marriage -- in other words, John makes no cameos in this whatsoever ... literally nothing.

In terms of what is in the book ... our sources tell us Anna mostly focuses on her mental health journey -- and she does, in fact, touch on men in her life, both explicitly and implicitly -- but we've been assured ... none of those fellas are John.

That might come as a bit of a shock to some ... and perhaps a letdown for others. We're sure Anna's book is good reading regardless -- but if you're looking for tea in this, you won't find it in her memoir.