The new fantastic World Atlas of Nudibranchs by Helmut Debelius and Rudie H. Kuiter is out. It shows nearly 1 200 species of the Nudibranchia (no other Opisthobranchia) figured on +2 600 colour photographs. The quality of the photographs is unsurpassed in color rendition and resolution. The book’s authors have gone to great lenghts to demonstrate locational color variation within a species, a feature that is sure to be appreciated. ! This book is a must for any and all sea slug enthusiasts!