Joanne Rocklin ; Marilyn Burns Related books Case Of The Missing Birthday Party: Hello Math (Hello Math Reader, Level 4) Scholastic • 1997 One Hungry Cat (Hello Reader! Math Level 3) Scholastic • 1997 The Case of the Backyard Treasure (Hello Math Reader, Level 4) (Hello Reader, Math) Scholastic • 1998 The Case of the Shrunken Allowance (Hello Reader Level 4) Scholastic • 1998