Recommended books (in no particular order)
- Caverns Measureless to Man (Sheck Exley)
- Basic Cave Diving: A Blueprint for Survival (Sheck Exley)
- Aquanaut (Rick Stanton)
- Shadow Divers (Robert Kurson)
- The Darkness Beckons (Martyn Farr)
- Into the Planet (Jill Heinerth)
- Underwater Potholer (Duncan Price)
- Deep (James Nestor)
- Close Calls (Stratis Kas)