The great thing about a self-publishing platform like Amazon's CreateSpace is that it allows for the creation and distribution of wonderful little publications that might not otherwise see the light of day. "Tricks of the Classic NES Tetris Masters" by Brian K. Smith is such an example.
While Tetris itself is one of the most beloved video games of all time, dedicating an entire book to just one version might seem a little too niche. This book runs with that idea, however, and it's a great way to take what turns out to be a tremendous amount of information and focus it.
The book includes a well written single page introduction from Alex Kerr, a Tetris Grandmaster, that gives some insight into why the NES version of Tetris is special and later in the book the author discusses the Tengen version of the game that was taken off the market. There could have been more discussion about this version, although I understand why there wasn't.