Brett Ortler

• Dinosaur Discovery Activity Book
• Animal Tracks Activity Book
• Backyard Science and Discovery Workbook : Midwest
• Beginner's Guide to Ship Watching on the Great Lakes
• Firefly Book
• Minnesota Believe It or Not History
• Minnesota Trivia Don'tcha Know!
• Minnesota Trivia Don'tcha Know!
• Mosquito Book
• Outer Space Activity Book
• Surviving Minnesota Winter
• The Fireflies Book