This book is so amazing. Like love it!!! It takes place in the year 1960. The main characters two twin one girl that's older by like twenty minutes her name is Helen (who has a crush on Alan) and her younger brother name Henry (who was the first to go into the other world by the little short novel he found in Carl campsite/hangout) There's a boy name Alan (younger brother of Carl/nice guy) and Niki (Helen BFF/Henry crush) and finally Carl (Alan older brother/the one who discovered the other side/Mean guy)
Since I gave you a little background of each character let's begin.
So all of these main characters are all bff and they were going to use their last summer day of vacation to beat up Carl for hurting/punching Ernest (a friend) so the gang got together and were on the hunt to find Carl basically and we'll it goes bad they find Carl secret hid out and found short little stories that Henry took. And while heading back to their bikes they encounter Carl and Carl gives Henry a black eye and he has to deal with that. Later that day he reads the short little stories he picked up on Carl hideout and discovers a new world like the fall asleep say specific numbers before they go to sleep and there souls walk and no one can see them unless their also in that world it's pretty interesting. I enjoyed it and I totally recommend it.