15 books • 4 series
Book #1: Isaboken 1
Book #2: Isaboken 2
Book #3: Isaboken 3
Book #4: Isaboken 4
Book #1: The Isa Book 1
Book #2: The Isa Book 2
Book #4: The Isa Book 4
Book #1: The Spencer Book 1
Book #3: The Isa Book 3
Book #4: Astas fotbolls bok
Book #4: Isa's Football Book