MA: The Edinburgh/Cambridge Morphological Analyser and Dictionary System [Version 3.0] User Manual by G.D. Ritchie, A.W. Black, S.G. Pulman, and G.J. Russell.
G + M: Natural Language Processing in Prolog, by G. Gazdar and C. Mellish, Addison Wesley 1989. (I have the Prolog version. I don't know how similar it is to the Lisp one.)
Sedgewick: Algorithms (2nd edition), by R. Sedgewick, Addison Wesley 1988.
Wood: Data structures, algorithms and performance by Derick Wood, Addison Wesley 1993.