A Field Guide to the Identification of Pebbles has sold over 50,000 copies, and now this extremely popular title is also available in French. The Guide practique d'identification des cailloux is a full-colour, laminated, accordion-folded, easy to use guide with over 80 beautiful photographs of pebbles from beaches and rivers. A great resource for French Immersion schools, the short text deals with how rocks form and how to tell if a rock is igneous, sedimentary or metamorphic