So a few hours ago I finished the screenplay of 'Fantastic Beasts and Where to Find Them' and I loved it! I can't wait to see it in cinema but if you haven't read the screenplay or the original school book I would definitely recommend reading them both as they are both truly superb. I also haven't watched any of the trailers for the film and I've stayed as far away as possible from information about it so I wasn't really sure what to expect but I loved it, all of the scenes were beautiful and the last one almost made me cry. So yes definitely read the books, they are wonderful and the film I'm sure is wonderful too.