10 books • 3 series
Book #1: Hold On!
Book #2: Go! - Hold On! Season 2
Book #3: Run! - Hold On! Season 3
Book #4: Hold On! - Tomorrow
Book #1: Invincible - Season 1
Book #2: Stormwing - Invincible Season 2
Book #3: Dare - Invincible Season 3