The third edition of the DEB-book S.A.L.M. Kooijman Dept Theoretical Biology, Vrije Universiteit, Amsterdam bas@bio.vu.nl; http://www.bio.vu.nl/thb/ Ifremer Nantes 2008/10/28-29 About half of the text of the second edition has been replaced, and the other half reorganised; it also grew some 70 pages. I will discuss the main differences and additions, and enlarge on age-related topics, because these have not been discussed in previous meetings.