Instruct: Classify a given review as either positive or negative.
Query: A true breakthrough for swimmming enthusiasts!

Breakthrough Swimming offers an interesting mix of historical,theoretical and practical information which anyone who wishes to learn more about the sport of competitive swimming can appreciate. Cecil Colwin is the one of the brilliant swimmming minds in the world and all of his extensive experience and education shine through in this book. Coaches, swimmers and fans of all knowledge and experience levels will find relevant and usable information which is presented in a thorough yet reader-friendly manner.