Could you recommend some books for Summer?

I'm reading a book called Green Darkness by Anya Seton right now. It's historical fiction, but with a twist, as it begins and ends in 1968, but the majority of the novel takes place from 1552-1559. A chain of events forces the main character to revisit her past life during the Tudor period. This is done in order to discover what went wrong, presumably so that something can be done/changed to save her present self. Apparently, something terrible happened. It's very mysterious and unique, and the author paints a vivid picture of the era without distancing the reader. I know nothing about the Tudor period, so that was a pleasant surprise. Good book so far. From the prologue onward, it's impossible not to be curious.