The author is Katarina Walker.
Spanish 21, and its Australian counterpart, Pontoon, is as beatable as Blackjack. "The Pro's Guide to Spanish 21" will teach you how to play optimally and how to apply proven Blackjack card-counting techniques to Spanish 21. Topics covered include: basic strategy for 15+ rule variations, house edge, EOR, standard deviation, the Basic Hi-Lo counting system, optimal betting, indices, money management, camouflage, finding the best games, and much, much more. Foreword written by Don Schlesinger.