My number 1 tip: take an AIDA freedive course! There are numerous freedive bodies and certifications out there. AIDA is non-profit and stay on top of the latest research in order to provide the best and most safe freedive education.
Manual of Freediving – Still the best book out there explaining all the ins and outs about freediving. Written by the superhuman Umberto Pelizzari. As far as I know, there are only hardcopies available.
Deep A book about freediving, renegade Science and What the Ocean Tells Us About Ourselves.
Breatheology – by Stig Aval Steverinsen. We can live weeks without food, days without water, but only minutes without oxygen. Optimize you breathing and optimize your life! Reading and applying techniques in this book are one of the best investments you can make!
Blue Mind – By Wallace. J. Nichols. Amazing read about The Surprising Science That Shows How Being Near, In, On, or Under Water Can Make You Happier, Healthier, More Connected, and Better at What You Do.
More Freedive Resources
Deeperblue A forum on diving & freediving. Updates, articles, gear, destinations discussions.
Apnea Trainer The breathing exercise app I use to train for freediving and stay strong.
After freediving fuel: Coconut Peanutbutter!! It’s my guilty pleasure and nurtures your muscles (&soul) right away.