NSS could use a bit of member help. Next time you are at an outdoor shop (REI, EMS, Campmor, or local) ask them if they have a copy of CAVING BASICS by Dean Wiseman & Curt Harler. The way to get this book into potential members' hands or onto the shelves of new cavers is to have local shop managers request it from their buyers. Even a casual mention will help.
This is a NSS publication. All profits go to the NSS (not the writers or editors).