Billy Brown (Brown, Billy)

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  Attack of the Mutant
  by Dan Angel, R. L. Stine, Melinda Metz, Billy Brown
  Softcover, Scholastic Paperbacks, ISBN 0590939696 (0-590-93969-6)
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  The Cuckoo Clock of Doom
  by R. L. Stine, Carol Ellis, Dan Angel, Billy Brown
  Softcover, Scholastic Canada, Limited, ISBN 0590745875 (0-590-74587-5)
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  The Headless Ghost
  by R. L. Stine, Carol Ellis, Dan Angel, Billy Brown
  Softcover, Scholastic Paperbacks, ISBN 0590939548 (0-590-93954-8)