The Halloween Dino Trip - The Mystery Adventures of Jillian Waylan, #1

Jillian is planning her first big Halloween party and hopes the weather holds out. Well, the weather does...but after Jillian, in her witch's outfit playfully chants the following from a prop witch's spell book:"Changes are due.Not many but a fewTo meet your historyAnd see it's not miseryGhosts will aboundTrekking all aroundFor you will now travelIn a land full of marvel"everyone is in for the surprise of their life.
Her backyard is gone. In its place greenery filled with tall trees, a variety of bushes, and... DINOSAURS?The Mystery Adventures of Jillian Waylan will be a series of books for grades 4 - 6 where a witch's spell book ends up in Jillian's hands all the time, no matter how much she tries to get rid of that book. Exciting adventures to other times and interesting historical figures are in store for all of her friends.
But the mystery is...who keeps placing that book in Jillian's hands? A clue is placed in each book for the readers to try and figure it out.