Two ex-Microsofties - both of whom once led major software business units - divvied up all competitive business situations into five basic models, describing their advantages, vulnerabilities and a series of insights about each positioning strategy. John Zagula's and Richard Tong's Marketing Playbook describes the different marketing plays (drag race, platform play, stealth, best of both, and high-low) lucidly and with some humor. The book's particular strength lies in the area of broad strategy, giving entrepreneurs some new angles and considerations with which to approach market positioning. The tactical portions are squishier, perhaps necessarily, as the authors must describe tactical specifics yet at the same time appeal to a vast array of different types of business readers. The book remains at most times approachable and actually fun to read, avoiding the evangelistic and pedantic tones that often infect the genre.