This is a classic in the field of Adaptive Radiations and still stands as such. It is well written, clear, and concise. Other volumes, such as Adaptive Speciation edited by Dieckmann, Doebeli, Metz and Tautz in the Cambridge Studies in Adaptive Dynamics series Adaptive Speciation (Cambridge Studies in Adaptive Dynamics), are available that go over the subject which focus more on examples from relevant literature. However, this book provides a firm foundation in the principles. It is a must read for any studies involving adaptive radiations. Highly recommend.