Japanese publisher Kadokawa will release a Puyo Puyo 25th Anniversary book on March 24th, 2016 for a 1,800 yen price:
To commemorate the Puyo Puyo series 25th anniversary, an anniversary book will be launched! Packed with Puyo Puyo Games, characters, related goods, such as novels and comics, and information can be seen through 25 years of history! By all means, please look forward to it!
The book can be preordered, with global shipping, through Amazon Japan.