I have already bought this book 7-8 times for family & friends. Some companies buy thousands of them for their employees. The psychological approach is great as it focuses on your strength, not trying to develop your weaknesses. STRONGLY recommended for anyone between 15 and 45 years old. Also for your children !
Very good book with a lot of details and techniques. However a little big. Impossible to transport with you on holiday (3-4Kg) If you can read french, look for Isabelle & Amar Guillen's "Les secrets de la photo sous-marine"