Alpine Caving Techniques
Alpine Caving Techniques, by Marbach and Tourte.
Third edition, 2002, 394 pages and fully illustrated.
If you are serious about your technical caving, as regards climbing, rigging, and general exploration of deep caves, then you should have this book. The authors are exceptionally knowledgeable and experienced (Marbach founded TSA, and Tourte is the key product developer for MTDE)so even seasoned cavers should find a lot to think about in here.