Are We Smart Enough To Know How Smart Animals Are, by Frans De Waal Various anecdotes/opinions about animal intelligence. Pleasant! Overall thesis is
Wittgenstein's Poker, by John Eidinow and David Edmonds That one time Wittgenstein maybe (or did he?) threatened Popper
The Science of Enlightenment, by Shinzen Young How to become enlightened. This is one of my favourite