As one of the most central categories of the Tocharian verb, the subjunctive is of utmost importance for the reconstruction of the verbal system, the most rewarding domain of Tocharian historical grammar. Michaël Peyrot provides a thorough analysis of the formation of the subjunctive in both Tocharian languages, and establishes its meaning on the basis of a systematic investigation of a wealth of published and unpublished texts. A careful reconstruction of the Proto-Tocharian stage provides a solid base for the comparison with Indo-European and the derivation of the Tocharian subjunctive from the proto-language. With its focus on the wide variety of intricate morphological patterns, The Tocharian Subjunctive is at the same time a study of the whole Tocharian verbal system.