"How to Change Your Mind" by Michael Pollan. A fascinating look into the world and science of psychedelic drugs.
"Rendezvous with Rama" by Arthur C. Clarke. One of, if not Clarke's best. It's short for a sci-fi book and almost impossible not to like.
"The Hydrogen Sonata" By Iain M. Banks. It certainly wasn't my favorite culture entry, but it's worth a read none the less. If you haven't read the others in the series I wouldn't suggest starting with it.
"Children of Time" by Adrian Tchaikovsky. It took me a bit to get into this book, but once I did, I really enjoyed it. If you're into long timelines and human existential crisis this is your book.
As far as July goes, I'm digging into "Matterhorn" by Karl Marlantes and "The Origins of Consciousness in the Breakdown of the Bicameral Mind" by Julian Jaynes.