Skin diving
58 books
Manual of freediving
The silent world
Deep: Freediving, Renegade Science, and What the Ocean Tells Us about Ourselves
Froggy learns to swim
The hidden forest
The Danger
Dead in the Water
Scuba diving & snorkeling for dummies
The art of not breathing
Skin Divers
The rope-dancer
One breath
The complete diver
The Dive
Scuba
Dark and full of secrets
The Demeter Star
The snorkeller's guide to the coral reef
Snorkeling with sea-bots
Diving & snorkeling Baja California
Diving Malaysia and Southeast Asia
Scuba diving & snorkeling
Jan has a doll
The mystery of the flooded mine
The dive sites of Kenya and Tanzania
My snorkel adventure (McGraw-Hill reading : leveled books)
Best dives' snorkeling adventures
Snorkeling with Nana
Snorkeling manual