This bibliography is quite an impressive effort. It is extensive, thorough, structurally sound, and contains excellent indexes. In short, it is a truly useful tool for anyone who, for scholarly or political reasons, takes an interest in Trotsky and Trotskyism. Of course, the definition of Trotskyism is somewhat blurred; too many people have used the concept subjectively, either with positive or negative connotations, for it to signify anything unambiguous. The Lubitzes have done their utmost to remedy this state of affairs by disregarding sectarian restraints and by choosing a broad approach to the subject; they have even gone to the extreme of including some anti-Trotskyist effusions of no real scholarly or current political value.