Dòng Nội dung
1
Bruce Coville s Is your teacher an alien? / with Lisa Meltzer and Larissa Harris ; illustrated by John Pierard.
New York : Pocket Books, 1997.
vii, 119 p. : ill. ; 19 cm.

Readers can work their way through puzzles, mazes, secret codes, riddles, and clues to determine whether their own teacher is an alien.
2
Everything to gain / Marilyn Tyner.
Washington D.C. : Arabesque, c2001.
254 p. ; 18 cm.