by Roberta Edwards; illustrated by True Kelley. by Roberta Edwards; illustrated by John O'Brien. by Roberta Edwards; illustrated by John Hinderliter. by Roberta Edwards; illustrated by Stephen Marchesi. written and illustrated by True Kelley. by Megan Stine; illustrated by Tim Foley. by Kirsten Mayer ; illustrated by Tim Foley. by Dr. Robert T. Bakker ; illustrated by Luis V. Rey. by Robert Levine; illustrated by Meredith Hamilton. by Nico Medina; illustrated by Tim Foley.