Stranger Things, Barbie, Star Wars, Five Nights at Freddie ’s . These are but a few of the mega franchises which have seen their worlds adapted into young adult novels. Franchise novels have been a long-standing part of YA since the era of the 90s paperbacks, and they’ve continued to be a staple within the category.  Diana Ma is among those authors bringing YA readers exciting franchise novels. She’s the author of Force of Chaos , the first in a Power Rangers series for YA readers. The second book in the series, Shatter the Universe , hits shelves on May 19.  → Ma says that “Writing a Young Adult Power Rangers novel from the perspective of Trini Kwan, the Yellow Ranger from the Mighty Morphin team, was a dream come true for me. Growing up, I was a superhero-loving fangirl, but I didn’t see many Asian American superheroes.…