Too many aliens
"Maktel Geebrit, Pleskit's pen pal from back home on Hevi-Hevi, is finally going to visit him on Earth.  Pleskit is excited, but a little nervous, too. How will Maktel get along with Pleskit's new friend, Tim?"
Fiction, Pleskit (Fictitious character), Children's fiction, Science fiction, Extraterrestrial beings, fiction
Bruce Coville