Delphis (Del) Levia, associate professor of geography at the University of Delaware, has always loved trees. Growing up on his parents' 93-acre farm in central Massachusetts, he and his brothers and sisters played in the woods all the time, under the towering American beech, sugar maple and oak trees. As a freshman in college, he originally thought he would pursue a career involving another type of "green" as a financial adviser. But then he took his first course in forest hydrology and became instantly rooted in learning more about this science, which requires extensive knowledge of both trees and the planet's water system to address such issues as the protection of watersheds for drinking water supplies. Recently, the energetic Levia put his passion to the page, as editor of the new book Forest Hydrology and Biogeochemistry: Synthesis of Past Research and Future Directions. Published in June by Springer in its distinguished Ecological Studies Series, the 740-page hardcover book has 75 contributors from 14 countries and is designed to serve as a comprehensive one-stop reference tool for researchers and practitioners internationally. Co-edited by geographer Darryl Carlyle-Moses from Thompson Rivers University in British Columbia and forest hydrologist Tadashi Tanaka from the University of Tsukuba in Japan, the book has 36 chapters that cover everything from novel sampling techniques, to hydrological analyses by ecoregion and forest type, to the impacts of insects, ice storms, global change and more. In identifying research needs, the book also charts the future research agenda for the field.