BibliographyOlla-Piska: Tales of David Douglas (2996). Portland, OR: Oregon Historical Society Press. (144 p.) ISBN: 9780875952970.
AWARDS: IRA Children's Book Awards (WON AWARD) 2007
Alexandria, Virginia (2006). New York: Oxford University Press, Incorporated. (48 p.) ISBN: 9780195173345.
Other Credits: Pamela Cressey (Co-Author)Aristotle: Philosopher and Scientist (2004). Berkeley Heights, NJ: Enslow Publishers, Incorporated. (112 p.) ISBN: 9780766020962.
Other Credits: Karen Stephenson (Co-Author)Chaco Canyon (2002). New York: Oxford University Press, Incorporated. (48 p.) ISBN: 9780195142808.
Other Credits: R Vivian (Co-Author)Scientists of the Ancient World (1999). Berkeley Heights, NJ: Enslow Publishers, Incorporated. (104 p.) ISBN: 9780766011113.
Other Credits: Karen Stephenson (Co-Author)Leapfrogging Through Wetlands (1998). Middleton, WI: Dog-Eared Publications. (40 p.) ISBN: 9780941042185.
Other Credits: Nancy Field (Co-Author), Karen Stephenson (Co-Author), Michael Maydak (Illustrator)AWARDS: Benjamin Franklin Award (NOMINATED FOR AN AWARD) 1999
Carl Linnaeus: Father of Classification (1997). Berkeley Heights, NJ: Enslow Publishers, Incorporated. (128 p.) ISBN: 9780894907869.
Children of Summer (1997). New York: Farrar, Straus & Giroux. (112 p.) ISBN: 9780374312435.
Other Credits: Marie Le Glatin-Keis (Illustrator)AWARDS: West Virginia Children's Book Award (NOMINATED FOR AN AWARD) 2000
Bizarre Insects (1996). Berkeley Heights, NJ: Enslow Publishers, Incorporated. (48 p.) ISBN: 9780894906138.
Isaac Newton: The Greatest Scientist of All Time (1996). Berkeley Heights, NJ: Enslow Publishers, Incorporated. (128 p.) ISBN: 9780894906817.
Charles Darwin: Naturalist (1994). Berkeley Heights, NJ: Enslow Publishers, Incorporated. (128 p.) ISBN: 9780894904769.
Food Chains: The Unending Cycle (1991). Berkeley Heights, NJ: Enslow Publishers, Incorporated. (64 p.) ISBN: 9780894902901.
The Ghost Inside the Monitor (1990). New York: Random House Children's Books. (128 p.) ISBN: 9780679803591.
The Druid's Gift (1989). New York: Random House Children's Books. (192 p.) ISBN: 9780394919362.
The Mists of Time (1984). New York: Random House Children's Books. (192 p.) ISBN: 9780394865737.
Light in the Mountain (1982). New York: Random House Children's Books. (192 p.) ISBN: 9780394847917.
Other Credits: Fred Marcellino (Illustrator)The Brain on Quartz Mountain (1982). New York: Random House Children's Books. (128 p.) ISBN: 9780394853857.
Other Credits: Charles Robinson (Illustrator)The Journey of the Shadow Bairns (1980). New York: Random House Children's Books. (196 p.) ISBN: 9780394845111.
Other Credits: PAtricia Lincoln (Illustrator)AWARDS: Mark Twain Award (NOMINATED FOR AN AWARD) 1983
In the Circle of Time (1979). New York: Random House Children's Books. ISBN: 9780394940298.
Searching for Shona (1978). New York: Random House Children's Books. ISBN: 9780394937243.
In the Keep of Time (1977). New York: Scholastic, Incorporated. ISBN: 9780590053792.
Exploring City Trees and the Need for Urban Forests (1976). New York: McGraw-Hill Companies, The. (112 p.) ISBN: 9780070016958.
To Nowhere and Back (1975). New York: Random House Children's Books. (160 p.) ISBN: 9780394930367.
Exploring the Insect World (1974). Blacklick, OH: McGraw-Hill Companies, The. (160 p.) ISBN: 9780070016255.
(YA)-Young Adult | (JUV)-Juvenile | (PICBK)-Picture Book | (OR)-Oregon Subject |








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