I really do think this book is so good.

"Captives of Time by Malcolm Bosse" | Goodreads

https://www.goodreads.com/book/show/1709582.Captives_of_Time

Also, it's kind of funny, because I couldn't read "Tree By Leaf," and then I decided to look at this one, but there's a very mean character named Clotilda in the book.