'It is clear that Glass and Water is a well thought through book that has been years in the development and writing. Mark has an encyclopedic knowledge of his subject and a clear and easy way of imparting his experience. The book is well laid out and designed and should be a must for anyone wanting to take pictures underwater'- gofreediving.co.uk; 'An outstanding resource for both novice and advanced freedivers, snorkelers and underwater photographers in general': deeperblue.com; 'A very informative book which will help freedivers improve their images... The nicest surprise for me was the "Virtual Dive" chapter. This chapter alone was worth the price of the book' - UWP magazine; 'You will end up with an extensive skill set if you pursue all avenues of advice... A great addition to the bookshelf for photographers and freedivers'- learn2freedive.com; 'It's most unlikely that you'll come away without learning something brand new and innovative... I'm very impressed indeed' - Martin Edge.; 'Glass and Water should be as essential as a pair of fins and a camera for underwater photographers. Mark shares his tremendous expertise ... the methodical and well-illustrated techniques will benefit anyone wishing to produce great images in the sea' - Brian Skerry.