About Isabelle Follath Books by Isabelle Follath Aggie Morton, Mystery Queen: The Seaside Corpse by (author) Marthe Jocelyn illustrated by Isabelle Follath Ages 10 to 18 Grades 5 to 12 Arthur Who Wrote Sherlock by (author) Linda Bailey illustrated by Isabelle Follath Ages 5 to 9 Grades k to 4 Aggie Morton, Mystery Queen: The Dead Man in the Garden by (author) Marthe Jocelyn illustrated by Isabelle Follath Ages 10 to 18 Grades 5 to 12 Aggie Morton, Mystery Queen: Peril at Owl Park by (author) Marthe Jocelyn illustrated by Isabelle Follath Ages 10 to 18 Grades 5 to 12 Aggie Morton, Mystery Queen: The Body under the Piano by (author) Marthe Jocelyn illustrated by Isabelle Follath Ages 10 to 18 Grades 5 to 12