I won this book as a FirstRead. 
 Jazz and Olivia are sisters who are polar opposites. Jazz is the grounded sister, immersed in reality, while Olivia has synesthesia and is more free-spirited. After their mother dies in a probable suicide, Olivia is determined to Cranberry Glades to see the will-o-the-wisps that their mother always said she wanted to see and that was the setting of the story their mom was writing. Jazz is sent along to take care of her little sister, who is legally blind from staring at the sun after their mom died. 
 The writing itself was good, but I had a hard time getting attached to the characters, which made it a slow read for me. The story did get better maybe 3/5 of the way through the book.