Book Review: Once Was a Time

In 1940 Charlotte Bromley and Kitty McLaughlin are best friends. When Charlotte's father, a scientist, discovers something that the Germans will want, Charlotte has to make a hard decision. Should she stay with Kitty or travel somewhere in time and place. Her decision leaves her alone in the world. She does not know what happens with Kitty. She knows she has to find a way to return to her friend.
This book is written for children in grades 4-6. I believe, although it is intense, children in these grades will love this book. It is a wonderful story of friendship, and the idea of time travel.
This beautifully written book is exciting and the ending is perfect. I highly recommend this book.
I was given this book by NetGalley in exchange for my honest review.