Portable Press is the home of Uncle John’s Bathroom Reader, the longest running and most popular trivia series of its kind. Uncle John’s Bathroom Readers have engrossed and informed fans for over 20 years, and with more than 10 million books in print the phenomenon is going strong.

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Silver Dolphin Books are designed to enlighten and entertain children of all ages. With amazing novelties and interactive elements such as pop-ups, sound, and more, Silver Dolphin Books give kids the tools to learn—while having fun.


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Thunder Bay Books brings information to life with highly visual reference books. Covering categories such as history, travel, pets, and reference with heavily illustrated books, Thunder Bay offers readers knowledge in ways they haven't seen before.


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