Properties and Products of Algae: Proceedings of the Symposium on the Culture of Algae sponsored by the Division of Microbial Chemistry and Technology of the American Chemical Society, held in New York City, September 7-12, 1969

Geoffrey Hayes’s two beloved mouse siblings return in their fifth story.

Benny’s in a foul mood! He can’t find his pirate hat, and he’s been sent outside to cool his temper. When he and Penny wander away from home and realize they’re lost, they must handle their emotions and put their heads together.