As you know – or if you’re a new visitor here, perhaps you don’t – I never leave my home without a book ready-to-hand; sometimes in a packet and others actually in-hand. Not unexpectedly, such EDR (every day read) books need to be small (see the aforesaid pocket reference) and relatively short to be toted about as such. Fortunately, many publishers have, and others continue to, make such pocket-sized books available. Most recently, I discovered two from Chronicle Books that are particularly well suited to the purpose: The Pocket Nature Series.