Considered one of the more historically important publications in recreational diving, "Basic Cave Diving: A Blueprint for Survival" is a short book on safe scuba diving procedures for cave diving by pioneer cave diver Sheck Exley.
It was originally published in 1979, and is considered to have had a significant impact on the number of cave diving fatalities since publication.
4.4 star review on Amazon (RRP is $35) https://www.amazon.com/Basic-Cave-Diving-Blueprint-Survival/…
Now provided for free download. Direct download link
thanks financialminimalism! this looks like a really interesting read, awesome!