The travel edition. Reef Fish 3rd Ed., Reef Creature 2nd Ed. and Reef Coral 2nd Ed. in a handy, weather-resistant Cordura Canvas bag. This is the set you want instead of the shelf case set if you are taking the books "in the field" with you. We never leave home without our Travel Set in the gear bag. It protects our reference books while we are on or off the boat.