This book is written by Alex Garland. It’s a great adventure book which tells the story of a young American (Richard) and his travels to Bangkok, Thailand. Richard gets a strange map from Daffy which apparently leads to a secret, paradise beach and lagoon. Together with two newly made friends, they set out to find it. It is a book full of adventure, betrayal, mystery, and action. There is a film of the same name.
Please note that the book is not new.