KnowledgeBooks from Portable Knowledge, LLC are a series of free specialized reference apps for mobile devices.  Covering a range of specialities as well as general-knowledge areas, KnowledgeBooks are ideal to look up that quick fact that is right on the edge of your mind.   You know you know it, let KnowledgeBooks remind you!

Currently, KnowledgeBooks are available for Apple iOS-based devices (iPhone, iPad, and iPod Touch) and Android-based devices (including Honeycomb tablets!).  KnowledgeBooks for Windows Phone devices are coming soon.

The full list of publicly available KnowledgeBooks appears on the left.  Have an idea for a KnowledgeBook we don't have?  Please let us know, and your idea may come to life!

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