I read Sapiens a couple of years ago, and enjoyed it thoroughly! It was a bit of a task staying with such a long book as I only find time to read at night. But it was worth finishing and helped my love of genetics (since high school 50 years ago) re-emerge.
I since loaned out the book, and it has further traveled. I don't believe I want to read it again, but many want to discuss it as a group...getting the Summary would help me with that, and good to keep as a quick reference.
Great writing, interesting even for a non-scientist, and should be required reading in college HISTORY classes. My BA is in History, Biology and Geography (Liberal Arts). It all fit right together.