It has been a loong time since I read The Year of the Flood and even longer since I read Oryx and Crake but I almost think this could be a circular series where it doesn't matter where you start. Because each book has stories that happen at the same time or previous to the other books. And each book fills in some part of the other books and leaves the reader with a few mysteries.
Atwood does a masterful job of weaving together Zeb's, Toby's and Blackbeard's stories and points of view and revealing more of the history of Zeb and Adam One and other characters.
I got a little tired of Toby's insecurity.
I will have to go back and read the previous two books again.

Left in the Little Free Library