Ant, The Definitive Guide, by Jesse Tilly & Eric M. Burke. O’Reilly, 2002. ISBN 0-596-00184-3.
This is a classic O’Reilly animal book showing – what else? – a horned lizard on the cover. But it’s classic member of the series in another sense: it’s a straightforward reference to the basics of its topic. I was working with NAnt, so there were a few quirks not covered, but it was easier to use this book in combination with NAnt’s online material than to use the online material alone. Note that the book covers 1.4.x, not the current version. (Reviewed Aug., ’04)