1.) 100 Butterflies and Moths
Winifred Hallwachs, Daniel H. Janzen, Jeffrey C. Miller
Belknap Press; 2009
paperback

2.) 100 Butterflies and Moths
Winifred Hallwachs, Daniel H. Janzen, Jeffrey C. Miller
Belknap Press; 2007
hardback

3.) 100 Caterpillars
Winifred Hallwachs, Daniel H. Janzen, Jeffrey C. Miller
Belknap Press; 2006
hardback

4.) Costa Rican Natural History
Daniel H. Janzen (Eds.)
University of Chicago Press; 1983
hardback

5.) Costa Rican Natural History
Daniel H. Janzen (Eds.)
University Of Chicago Press; 1983
paperback

6.) Designing Conservation Projects
Julian Caldecott, Daniel H. Janzen (foreword)
Cambridge University Press; 1996
hardback

7.) Designing Conservation Projects
Julian Caldecott, Daniel H. Janzen (foreword)
Cambridge University Press; 2009
paperback

8.) Ecology of Plants in the Tropics (Studies in Biology)
Daniel H. Janzen
Hodder; 1975
paperback

9.) Ecology of plants in the tropics (The Institute of Biology's Studies in biology ; no. 58)
Daniel H. Janzen
Edward Arnold; 1975
Unknown Binding

10.) Herbivores
Daniel H. Janzen (Eds.), Gerald A. Rosenthal (Eds.)
Academic Press, U.S.; 1980
hardback

11.) Plant Conservation
W. John Kress (Eds.), Gary A. Krupnick (Eds.), Daniel H. Janzen (foreword)
University Of Chicago Press; 2005
hardback

12.) Plant Conservation
W. John Kress (Eds.), Gary A. Krupnick (Eds.), Daniel H. Janzen (foreword)
University Of Chicago Press; 2005
paperback

13.) The Black Flies (Simuliidae) of North America (Comstock books)
Peter H. Adler, Douglas C. Currie, Daniel H. Janzen, D. Monty Wood, Ralph M. Idema (illustrator), Lawrence W. Zettler (illustrator)
Cornell University Press; 2004
hardback