I read this book last year. Here is my review for it which still sums up my feelings for it now as well:
`This book had such an interesting premise, the in-between world, the creepy atmosphere, the strange happenings. Yet it felt like there was still something missing, some piece to tie it all together better.
The descriptions of the willows and the strange world were great and really set the unsettling tone. I kind of wish more time was spent there and the mystery was unraveled further within that realm rather than getting all the information from outside sources. As much as the museum was a cool concept it didn’t feel all that connected.
However overall if you don’t overthink it, it’s a good story with an unsettling atmosphere and I did enjoy it. `