J. Baumeister: Stable solution of inverse problems. 
Vieweg 1987, 250p. DM 54. 

19813 Martin Burger: Inverse problems. Lecture notes Univ. Münster 2007, 80p.

3232 Heinz Engl: Inverse und inkorrekt gestellte Probleme.
2790 Chatterji/, 77-92.

Charles Groetsch: Inverse problems in the mathematical sciences.
Vieweg 1993, 150p. 3-528-06545-1. DM 42.

19619 Charles Groetsch: Inverse problems. MAA 1999, 220p. Eur 40.

A. Louis: Inverse und schlecht gestellte Probleme.
Teubner 1989, 200p. DM 27. 
Rather useful, but not carefully written, and many typoes.

19815 Frank Natterer: Inverse Probleme. Vorl. Univ. Münster 2003, 118p.

19470 Frank Natterer: Inverse Probleme partieller Differentialgleichungen.
Internet 2000, 87p.

19442 Albert Tarantola: Inverse problem theory. SIAM 2005, 358p.
Available on Internet.