I've started using Goodreads, which is why I haven't added much of my reading to this site lately. Currently, I'm reading three books.  

• Kill Decision (Daniel Suarez) - light reading that I"m going to finish soon.
• Fatal Discord (Michael Massing) - parallel biographies of Erasmus and Martin Luther.   This is my big summer book to read on hot days on the deck. 
• Why Your Five-Year-Old Could Not Have Done That: Modern Art Explained (Susie Hodge) - I've been working on this since Christmas.  This has thumbnail sketches of various modern artists, highlighting one of their works.  Taken alone, this book is superficial, but my strategy is to read one artist at a time and then watch a few YouTube videos about the artist. I think this works pretty well.  I've done around 20 artists so far.  

Prior to these, I read two by Jan Willem van de Wetering:

• The Corpse on the Dike
• Tumbleweed

Between those two, I read A Brief History of Everyone Who Ever Lived (Adam Rutherford)