Graham Rice spent years working with more than 45 contributors from the U.S., Britain and Canada, which as far as I’m concerned, sets a standard for encyclopedias. It’s written in clear, understandable English instead of the botanical-speak jargon common to its genre. The book is enhanced by boxes on everything from the invasive peril of purple loosestrife to how and when to move peonies. There are lots of well-sized photos, some by Graham’s wife, judywhite. Click here to read my interview with Graham.