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In a touching tribute to her estranged mother Jaid, actress Drew Barrymore shared a throwback photo via Instagram Tuesday.

“Today I wrote a book,” Drew said of her new book Wildflower. “And as I thank and celebrate many women this week, I must say a huge thank you to my mother. As I say in the acknowledgments, “thank you for my life. I am ever so pleased to be here!” We have had quite a road, but it is paved with gratitude. #amazingwomenweek #wildflowerbook.”

In her new book, the actress, 40, talks about family life with husband Will Kopelman and their two daughters: Olive, 3, and Frankie, 18 months.

She also reflects on “the in-between moments” of her very public childhood, pre-teen drinking and clubbing, going into an institution at 12, and becoming an emancipated adult at 15. As well, she shares intimate stories — from working on the set of E.T. with director and mentor Steven Spielberg, to the lifelong friendships she’s made with Adam Sandler, Cameron Diaz and her producing partner at Flower Films, Nancy Jovonen.

“It was such a private, quiet thing to write the book,” Drew told PEOPLE. “It was just for me. My girlfriends aren’t even in it enough as far as I’m concerned because they are such a big part of my life. They seem like just my friends, but my friends were like my first family. But it was a very quiet thing. I really dedicate it to my kids.”

Will she support her daughters if they want to become actors?

“One hundred percent,” Drew said. Even at a young age? “No!” she said. “Not even a little. Not until they’re 18. I know it sounds crazy, but I want them to be kids. But I would by no means poo-poo a thing I love so much!”

Wildflower hits bookshelves on Tuesday, Oct. 27.

Today I wrote a book. And as I thank and celebrate many women this week, I must say a huge thank you to my mother. As I say in the acknowledgments, “thank you for my life. I am ever so pleased to be here!” We have had quite a road, but it is paved with gratitude. #amazingwomenweek #wildflowerbook

A photo posted by Drew Barrymore (@drewbarrymore) on Oct 27, 2015 at 5:37am PDT