It is a fantasy.
NO!
Sprites are not real.
No, but he was based on a real person.
Yes
Yes
no
Arthur Spiderwick is a fictional character created by Tony DiTerlizzi and Holly Black in their book series "The Spiderwick Chronicles" and is not based on a real person.
Hate to break it to you, but there is no real Spiderwick Estate. The books are fantasy, therefore the estate never existed.
The Spiderwick Chronicles was a movie that was released in 2008. The main character was Jared, who was played by the actor Freddie Highmore.
Can't exactly be sure,but the stuff he discovered is very real.
Yes the authors got a letter from real people and their very real experience.