Have mercy. John Stamos‘ new memoir, “If You Would Have Told Me,” takes readers on an intimate ride through his life so far — from the way he grew up, to landing his first role, to becoming the world’s most beloved Uncle and becoming a dad for the first time — and everything in-between.

The book includes laugh-out-loud stories as well as heartbreaking accounts of loss. Additionally, Stamos revealed for the first time that he was sexually abused as a child by his 18- or 19-year-old babysitter, something he’s now also opened up about via Instagram.

“About five years ago, I was writing out a speech that I was going to make at a Child Help charity and I started writing and all of a sudden it just came back. Just like flooded me with a crystal clear vision of what happened back then and I was like — it was very unsettling. And I thought, ‘Well, should I talk about it in my speech? And then I thought ‘No, the night was about the kids and not me.’ So I packed it away and I thought, ‘Some day will be the right time to talk about this,'” he says in the video. “I’ve had three friends text me today. Three. Saying that they had a similar situation that happened to them and never told anybody. So if sharing my story has helped even those three friends of mine, then I’m glad I did it. Please know that it is never your fault and you deserve to be heard and you deserve to be supported.”

The memoir also details his time on “ER” and “General Hospital,” the dynamics of “Full House” and the romantic relationships that led him to meet his wife — while throwing in a trip to Burning Man with Maura Tierney and Linda Cardellini.

Scroll down for a list of some of the biggest revelations from “If You Would Have Told Me,” available now.