Spectral Immersions, A Comprehensive Guide to the Theory and Practice of Bass Clarinet Multiphonics by Sarah Watts. Metropolis, 2015(?), PB, 248 pages + 2 CDs. Sarah has recently completed a PhD in bass clarinet multiphonics. She has created new multiphonics charts for the bass clarinet and commissioned new works for bass clarinet that use her results. The book contains history, analysis, new charts and new compositions together with audio and data CDs. (C2342)