Grey Larsen in the 150 Gems collection has given us a most welcome follow-up to his encyclopedic volume The Essential Guide to Irish Flute and Tin Whistle (Mel Bay Publications 2003) and The Essential Tin WhistleToolbox (Mel Bay Publications 2004). The Gems feature not only meticulously-selected tunes but represent the first major offerings that use Larsen's innovative system of notating Irish ornamentation. This bookwith access to online audio will help players gain a deeper understanding of the Irish musical tradition as well as provide new material to enhance the experience of the solo player and Irish session participant alike.