User blog comment:ErnestoCabral2016/"I Am Slappy's Evil Twin" New SlappyWorld book?/@comment-28171460-20161128004750

Quck note; The book wasn't revealed on Streamable, the book was revealed in a big interview. Sadly, I wasn't able to find a video of the full interview, only a short clip from it, so I uploaded that to Streamable.

A while back Stine announced a SlappyWorld book called Jack Attack. Maybe Stine changed the name of the book from Jack Attack to I Am Slappy's Evil Twin... I suspect that the two books might be the same book.