With all due respect to Gord, for someone who is brand new to sailing I would recommend something non-technical like "Sailing Fundamentals" by Gary Jobson. With that book you will learn the very basics (parts of a boat, various sailing terminology) as well as some rudimentary sailing skills that you can apply out on the water
. This is the book most sailing schools use to teach the ASA
101 course - the first step in getting your bareboat certification
. I would also recommend taking a half-day sailing lesson at a local marina on something like a Flying Scot or other simple rigged boat of nominal size. Do that before hopping into a 30'+ boat for the first time.
Another really good and entertaining book is "Things I Wish I'd Known Before I Started Sailing", by John Vigor. He mixes valuable, practical insight with a bit of humor