You can download the 2007 edition of Vertical by Al Warild for free on Mark Passerby's website.This book handles most caving techniques, from basic to advanced. It is clearly written and nicely illustrated (190p.).
This is the American equivalent of the well known "Alpine caving techniques" from Marbach.
Despite the fact that it is primarily aimed towards an American audience, this 2007 revision also contains most European alpine caving techniques.
Book contents:
- Chapter 1: Personal equipment
- Chapter 2: Rigging equipment
- Chapter 3: Knots
- Chapter 4: Rigging basics
- Chapter 5: Advanced rigging
- Chapter 6: Descent
- Chapter 7: Ascent
- Chapter 8: Organisation
- Chapter 9: Disaster
- Chapter 10: Surveying