Slot Smarts: Winning Strategies at the Slot Machine is a useful book, but I wouldn't recommend the book as a practical tool of actual play.

Claude Halcombe focuses on profiling various personality types as he explains what kind of gambling environment one is favorable to. He gives several pointers of how to balance financial goals with gambling inclination, he explains his "Rule of 80" 80 percent of players can expect to lose 80 percent of their money playing the slot machines - he also explains how you can fit in the 20 percent of players who win more often while playing the slots, and he emphasizes the importance of money management and slot strategies.

The book will entice you to think strategically and have a game plan prior to entering the casino, but that goes without saying! This book won't provide you with anything insightful about the slot machines, and it won't offer you something you already aren't aware of. Therefore, yes, it's useful if you don't have previous knowledge of slot machine gaming, useful if you are being introduced to the game and if you have some spare time to read this book, in addition to other helpful tools on slot machine gaming.