This book provides a description of Classical Syriac phonology based on fully vocalized biblical texts and the detailed comments by medieval Syriac grammarians.
In addition to a description of Syriac consonants and vowels (including vowel quantity and stress), there are chapters on the compararive Semitic background of Syriac phonology and the grammatical features of the pre-classical inscriptions, and comparison with both eastern and western varieties of Jewish Aramaic. The modern dialect of Turoyo is also examined, and two appendices discuss the traditional pronunciation of West Syriac and the pronunciation of Modern Literary Syriac, and offer a sketch of Turoyo phonology.
Although the work is hard for me to judge given my limited knowledge of historical and comparative Semitics, I found this book to be a valuable source of information which is hard to come by elsewhere. While it's not the most readable, the content is clear enough and none of the arguments struck me as obviously problematic. It is worth a read for anyone getting into Syriac Studies.