When my daughter started reading Waterfall, my Kindle disappeared for a week until she had consumed the series. Here's what she says about the book.
I usually don't read a lot of medieval books. So I wasn't sure I would like this one. Boy, was I wrong. I really liked the time travel elements of the story. It was really cool because each time they entered a new world -- slipping from modern times to an medieval setting: battles and more. I really liked the she-wolf element -- the heroines are called the she-wolves of Normandy after a severe battle. Gabby and Lia show Marcelo and his friend that they are capable of fighting right beside the men. The book is packed with action with romance threaded in the story and a small dose of faith. These books are thrilling and great for readers (young and old) who love action and adventure in new settings.
I hadn't expected to read a "young adult" fiction book. But this book caught me and swept me into the "river"!! Absolutely wonderful, fast moving, and it catches the imagination. No worries recommending this book to your teens as a wholesome pick!!