I buy books in pairs or triples, but in the case of weather, both in preparation for the 35-hour Advanced Meterology Course and as a reference library after the fact, I bought four, the other three hot-linked below.

Weather extremes are getting worse, NOAA is under-funded and has trouble getting one 96 hour forecast out, the bottom line is that we are largely on our own where the boat meets the wave offshore.

This book is packed with more detail, including very specific guidance on what to do in relation to specific situations, and absolutely great multiple choice quesitons at the end of each chapter.

This is "the" textbook, but I don't believe in just one book, so I like all four together.

See also my list of books in my sailing library.

Understanding Weatherfax
The Weather Wizard's Cloud Book: A Unique Way to Predict the Weather Accurately and Easily by Reading the Clouds
International Marine's Weather Predicting Simplified: How to Read Weather Charts and Satellite Images