Instruct: Classify a given Amazon review as either positive or negative.
Query: Essential, though perhaps not complete

I don't know if I'd agree with the subtitle; Seidman's guide is by no means complete (for that, see Dowd's "Sea Kayaking") but it certainly does cover the essentials of the sport, and as others have noted, it is certainly sufficient to introduce a newcomer to all the essential techniques needed to get started. While no book is a replcement for a good teacher, Seidman gives you enough to get out and teach yourself basic strokes, braces and perhaps even rolls- though that's something best seen demonstrated first.The photos are one of the strongest parts of the book, and a good argument for buying it- next to the "Perforamance Sea Kayaking" video Seidman's book has the best illustrations of basic moves to be found anywhere. If you were only going to buy one kayaking book, this would not be a bad choice- but after working your way through it you'd be well advised to move on to more detailed and specialized books as well.