Key Features Description Principal Wagner confidently deals with a faculty washroom crisis, a psychic parrot, and a terrorizing gerbil, but when 65 erasers go missing, he enlists the help of the school's best problem solver, twelve-year-old Lyle Williams, aka Mudshark. Principal Wagner confidently deals with a faculty washroom crisis, a psychic parrot, and a terrorizing gerbil, but when 65 erasers go missing, he enlists the help of the school's best problem solver, twelve-year-old Lyle Williams, aka Mudshark. Product Details Item #: NTS528407 ISBN13: 9780545284073 Format: Paperback Book Pages: 96 Genre: Mystery and Suspense Grades: 5 - 6 Lexile® Measure: NC1080L Guided Reading Level: GR Level T DRA Level: 40 - 50 ACR Level: 6.3 Key Features Item #: NTS528407 ISBN13: 9780545284073 Format: Paperback Book Pages: 96 Genre: Mystery and Suspense Grades: 5 - 6 Lexile® Measure: NC1080L Guided Reading Level: GR Level T DRA Level: 40 - 50 ACR Level: 6.3