In a recent publication called "Secure passwords using combinatorial group theory," by G. Baumslag et al., it says that the following book is a "standard reference" in combinatorial group theory.
Camps, Gr Rebel and Rosenberger, "Einführung in die Kombinatorische und die Geometrische Gruppentheorie".
Is there an English translation of this book?
I couldn't find one. Please help :)