I echo SeaRat. For me the best comprehensive recreational book on Scuba instruction is The New Science Of Skin And Scuba Diving, it was published in six editions from about 1959 through 1986, although editions 3, 4 and 5 are my favorite and probably in the sweet spot before the agencies [PADI, NAUI, NASDS] had separate proprietary instruction manuals.
NOAA is great as well, if more geared to the scientific diver, and of course there is the US Navy Diving Manual [volume 1 is more open circuit scuba, volume 2 hardhat and closed circuit] a great military instruction manual.
PS - I learned on the 4th edition of The New Science of Skin and Scuba Diving.
NOAA is great as well, if more geared to the scientific diver, and of course there is the US Navy Diving Manual [volume 1 is more open circuit scuba, volume 2 hardhat and closed circuit] a great military instruction manual.
PS - I learned on the 4th edition of The New Science of Skin and Scuba Diving.