I will give brainlest

How did Ben franklin figure out that Dr. Mesmer was a fraud ?

Dr. Mesmer spread lies about Ben on You Tube. Ben Franklin then make a video exposing Mesmer and his lies. This made a lot of leaked video footage of Mesmer be leaked out into the public, him stealing ideas and Bens Girl! Untimely the “Cancel culture” clanceled Mesmer because Ben had exposed him for his lies. Mesmer has now made a “fans only” account to try to salvage his career. While Ben continues to post regularly on You/tube

there are 7 books in the origional series

Explanation:

they there is the cursed child - a stage play 19+ years after the last harry potter book

fantastic beasts and where to find them - movie screenplay/movie set in 1926

fantastic beasts and where to find them: The crimes of grindelwald - movie screenplay/movie set in 1927