viii, 199 pages. Text block very slightly sunned. Top of dust-wrapper has some extremely mild creases. "Relevant Logic" describes the philosophical basis and the formal theory of logical argument. The notion of relevance required for this theory is obtained by analysis of the grounds for asserting a formula in a proof. Stephen Read's proof-theory embraces classical, relevant and modal logics and is consistent with the appropriate semantics. "Relevant Logic" also contains a philosophical analysis of the notion of meaning as it relates to logical theory.