Book excerpt: The Encyclopedia of Applied Geology is an international compendium of engineering geology topics prepared by experts from many countries. The volume contains more than eighty main entries in alphabetical order, dealing with hydrology, rock structure monitoring and soil mechanics in addition to engineering geology. Special topics focus on earth science information and sources, electrokinetics, forensic geology, geocryology, nuclear plant siting, photogrammetry, tunnels and tunnelling, urban geomorphology and well data systems.