Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Great book, but Magic Cap is no longer around

This book at one time was the only source for examples of Magic Cap programming -- other than what you could buy directly from the company that made this revolutionary operating environment for hand-held devices. Unfortunately, this operating environment is no more, and hasn't been sold or used for a few years now. Magic Cap is still interesting from a historical-type perspective on OSes, or for insights into developing operating environments for small screens, but as a developer platform, it is no longer around. Too bad: it was very cool while it lasted, and this book was a great way to learn it.