Books mostly encoded in djvu format.  Download free viewers at: http://sourceforge.net/projects/djvu/files/

If you enjoy any of these resources, please support the authors by buying the publication (especially for the small publishers or self-publishing authors!)

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BOOKS INCLUDED IN THIS TORRENT:

birds:
birdlifebehavior.djvu - The Sibley Guide to Bird Life and Behavior, by Chris Elphick, John B Dunning Jr, and David Allen Sibley; 2001
handbook.djvu - The Birder's Handbook, by Paul Ehrlich, David Dobkin, and Darryl Wheye
nestseggsnestlings.djvu - Nests, Eggs, and Nestlings of North American Birds, second edition, by Paul Baicich and Colin Harrison; 2005
petersonBirds.djvu - Peterson Field Guide to Birds of North America, by Roger Tory Peterson; 2008
Raptors.djvu - Raptors of North America, by David Lukas; 2005
sibley.djvu - The Sibley Guide to Birds, by David Allen Sibley; 2000
stokesbb1.djvu - A Guide to Bird Behavior, Volume I, by Donald Stokes; 1979
stokesbb2.djvu - A Guide to Bird Behavior, Volume II, In the Wild and at Your Feeder, by Donald & Lillian Stokes

fish:
fishesCA.djvu - Inland Fishes of California, by Peter Moyle; 2002
SchultzFresh.pdf - Ken Schultz's Guide to Freshwater Fish, by Ken Schultz
SchultzSalt.pdf - Ken Schultz's Field Guide to Saltwater Fish, by Ken Schultz

fungi:
macrolichens.djvu - Macrolichens of the Pacific Northwest, by Bruce McCune and Linda Geiser; 1997
mush.djvu - Mushrooms Demystified by David Arora

herps:
amphibs.djvu - Amphibians of the Pacific Northwest, by Lawrence Jones, William Leonard, & Deanna Olson; 2005
amphibsrepsPNW.djvu - Amphibians and Reptiles of the Pacific Northwest, by Ronald Nussbaum, Edmund Brodie Jr, & Robert Storm; 1983
frogstoadsNA.djvu - The Frogs and Toads of North America: A Comprehensive Guide to Their Identification,Behavior, and Calls, by Lang Elliott; 2009 (the CD accompanying this book is in Nature Field Guides #2)
reptiles.djvu - Reptiles of the Northwest, by Alan St. John; 2002
stokesAmphibsReps.djvu - A Guide to Amphibians and Reptiles, by Thomas Tyning; 1990
westernherps.djvu - A Field Guide to Western Reptiles and Amphibians, Third Edition, by Robert Stebbins; 2003

insects:
americaninsects.djvu - American Insects: A Handbook of the Insects of America North of Mexico, Second Edition, by Ross Arnett Jr; 2000
ants.djvu - Ants of North America: A Guide to the Genera, by Brian Fisher & Stefan Cover; 2007
beetlesCA.djvu - Field Guide to Beetles of California, by Arthur Evans & James Hogue
butterfliescascadia.djvu - The Butterflies of Cascadia, by Robert Michael Pyle; 2003
butterflies.djvu - Butterflies Through Binoculars, by Jeffrey Glassberg, 2001
caterpillars.djvu - Caterpillars in the Field and Garden, by Thomas Allen, Jim Brock, & Jeffrey Glassberg; 2005
dragonflies.djvu - Dragonflies Through Binoculars, by Sidney Dunkle; 2000
foodinsects.djvu - The Food Insects Newsletter (Volume 5, #2 through Volume 11, #2.  Doesn't include every issue between those.)
gallsPNW.djvu - Common Insect and Mite Galls of the Pacific Northwest, by Hiriam Larew & Joseph Capizzi; 1983
grasshoppers.djvu - Field Guide to Grasshoppers, Katydids, and Crickets of the United States, by John Capinera, Ralph Scott, & Thomas Walker
insectlives.djvu - A Guide to Observing Insect Lives, by Donald Stokes; 1983
insectsNA.djvu - Kaufman Field Guide to Insects of North America, by Eric Eaton & Kenn Kaufmann; 2007
insectsPNW.djvu - Insects of the Pacific Northwest, by Peter & Judy Haggard; 2006
songsinsects.djvu - The Songs of Insects, by Lang Elliott & Wil Hershberger; 2007 (the CD accompanying this book is in Nature Field Guides #2)
tigerbeetles.djvu - A Field Guide to the Tiger Beetles of the United States & Canada, by David Pearson, C. Barry Knisley, & Charles Kazilek; 2006

mammals:
mammalogists - American Society of Mammalogists publications
mammalsNA.djvu - A Field Guide to Mammals of North America North of Mexico, Fourth Edition (Peterson Field Guide), by Fiona Reid; 2006
mammalsORcoast.djvu - Natural History of Oregon Coast Mammals, by Chris Maser, Bruce Mate, Jerry Franklin, & C. T. Dyrness; 1981
mammalspnw.djvu - Mammals of the Pacific Northwest: From the Coast to the High Cascades, by Chris Maser 
mammalsWAOR.djvu - Mammals of Washington and Oregon, by Tamara Eder; 2002

misc:
bacteria.djvu - A Field Guide to Bacteria, by Betsy Dexter Dyer; 2003
rocksminerals.djvu - Rocks and Minerals (Smithsonian Handbooks), by Chris Pellant; 2002
stars.djvu - The Stars: A New Way to See Them, by H. A. Rey; 1980
venompoison.djvu - A Field Guide to Venomous Animals and Poisonous Plants (Peterson Field Guide), by Steven Foster & Roger Caras; 1994

plants:
berries.djvu - Wild Berries of the West, by Betty Derig & Margaret Fuller; 2001
botany.djvu - Botany in a Day, 5th edition, by Thomas Elpel
canadafruitsnuts.djvu - Edible Wild Fruits & Nuts of Canada, by Nancy Turner & Adam Szczawinski; 1981
canadatea.djvu - Wild Coffee and Tea Substitutes of Canada, by Nancy Turner & Adam Szczawinski; 1978
canadaveg.djvu - Wild Green Vegetables of Canada, by Nancy Turner & Adam Szczawinski; 1980
canadaweeds.djvu - Edible Garden Weeds of Canada,  by Nancy Turner & Adam Szczawinski; 1978
cech.djvu - Growing At-Risk Medicinal Herbs, by Richo Cech
cherokee.djvu - Plants of the Cherokee, by William Banks Jr; 2004
feastingfree.djvu - Feasting Free on Wild Edibles, by Bradford Angier; 1972 (includes two books - Free for the Eating, and More Free-for-the-Eating Wild Foods)
flavors.djvu - The Flavors of Home, by Margit Roos-Collins; 1990
forage.djvu - The Forager's Harvest, by Samuel Thayer; 2006
gitksan.djvu - Ethnobotany of the Gitksan Indians of British Columbia, by Harlan Smith; 1997
gitksangathering.djvu - Gathering What the Great Nature Provided: Food Traditions of the Gitksans, by The People of 'Ksan; 1980
handbookNW.djvu - Handbook of Northwestern Plants, revised edition, by Helen Gilkey & La Rea J. Dennis; 2001
harrington.djvu - Edible Native Plants of the Rocky Mountains, by H. D. Harrington 
herbmanual.djvu - Therapeutic Herb Manual: The Therapeutic Administration of Medicinal Herb Compounds, revised & enlarged September 1983 edition, by Ed Smith
liveforever.djvu - It Will Live Forever: Traditional Yosemite Indian Acorn Preparation, by Beverly Ortiz as told by Julia Parker; 1991
montana.djvu - Montana Native Plants & Early Peoples, by Jeff Hart; 1996
moore.djvu - Medicinal Plants of the Pacific West, by Michael Moore; 1993
NAethnobotany.djvu - Native American Ethnobotany, by Daniel Moerman; 1988 
nwftrees.djvu - National Wildlife Federation Field Guide to Trees of North America; 2008
nwtrees.djvu - Northwest Trees: Identifying and Understanding the Region's Native Trees, by Stephen Arno & Ramona Hammerly; 2007
nyerges.djvu - Guide to Wild Foods and Useful Plants, by Christopher Nyerges
OakInsectsDiseases.pdf - A Field Guide to Insects & Diseases of California Oaks, by Tedmund Swiecki & Elizabeth Bernhardt; 2006
pacwf.djvu - A Field Guide to Pacific State Wildflowers, by Theodore Niehaus; 1976
plantsWAORBC.djvu - Plants of Western Washington, Oregon, & British Columbia, by Eugene Kozloff; 2005
pojar.djvu - Plants of the Pacific Northwest Coast, by Jim Pojar & Andy MacKinnon; 2004
prairie.djvu - Edible Wild Plants of the Prairie: An Ethnobotanical Guide, by Kelly Kindscher
schofield.djvu - Discovering Wild Plants: Alaska, Western Canada, the Northwest, by Janice Schofield; 2000
stalkingHealthfulHerbs.djvu - Stalking the Healthful Herbs, by Euell Gibbons
stalkingWildAsparagus.djvu - Stalking the Wild Asparagus, by Euell Gibbons
Sturtevants_Edible_Plants.pdf - Sturtevants Edible Plants of the World, edited by U. P. Hedrick
tasteofheritage.djvu - A Taste of Heritage: Crow Indian Recipes & Herbal Medicines, by Alma Hogan Snell; 2006
tilford.djvu - Edible and Medicinal Plants of the West, by Gregory Tilford
tozer.djvu - The Uses of Wild Plants, by Frank Tozer; 2007
treesshrubsCA.djvu - Trees and Shrubs of California, by John Stuart & John Sawyer
westerntrees.djvu - A Field Guide to Western Trees: Western United States & Canada (Peterson Field Guide), by George Petrides
wildflowersPNW.djvu - Wildflowers of the Pacific Northwest, by Mark Turner & Phyllis Gustafson; 2006
wildfoodadventurer.djvu - Wild Food Adventurer newsletter, by John Kallas
wildfoodsforum.djvu - The Wild Foods Forum newsletter (Volume 1, #3 to Volume 18, #3.  Doesn't include all issues in that range.)
wildman.djvu - Identifying and Harvesting Edible and Medicinal Plants: In Wild (and Not So Wild) Places, by "Wildman" Steve Brill with Evelyn Dean
wintertwigs.djvu - Winter Twigs, revised edition, by Helen Gilkey & Patricia Packard; 2001

tracking:
artoftracking.djvu - The Art of Tracking: The Origin of Science, by Louis Liebenberg; 1990
birdtracks.djvu - Bird Tracks & Sign: A Guide to North American Species, by Mark Elbroch & Eleanor Marks; 2001
elbroch.djvu - Mammals Tracks & Sign: A Guide to North American Species, by Mark Elbroch; 2003