David Lack's classic work on the finches of the Galapagos Islands (Darwin's Finches) was first published in 1947; few books have had such a great impact on evolutionary biology, indeed it is still one of the most succinct and fascinating treatises ever written about the origin of new species. The 1947 version is reproduced with facsimile pages of the original text, tables and line illustrations. The major feature of this reprint is the additional material supplied by Dr Peter Boag and Dr Laurene Ratcliffe who have both completed studies on the Galapagos. The readership will comprise students of evolution and ecology and those interested in the history of evolutionary thought. Amateur ornithologists and tourists visiting the Galapagos Islands will find this account fascinating.