The Color of Sound, by Emily Barth Isler

Feeling burdened by her mother's expectations, violin prodigy Rosie declares that she's "on strike" for the forseeable future and not going to play.  Her furious mother punishes her by taking away her internet privileges but still holds out hope that Rosie will return to practicing.  Steaming at each other over the impasse, mother and daughter are forced have to cohabit as they visit Rosie's dying grandmother.

To get away from her family Rosie explores the property and runs across a peculiar girl her age.  Through some time travel magic, the girl turns out to be Rosie's own mother.  While Rosie frets a bit about impacting the future by interacting with her past-Mom, she is able to use the experience to learn why her mother is so controlling.  At a pivotal moment, she is also able to repair their relationship by solving a crisis in her young Mom's life.

A touching story of family regrets and legacies that is laser focused on being a Mother-Daughter Bookclub read (there are even discussion questions at the end of the book!).  I found myself getting annoyed by the way that mom's anxiety is portrayed and excused.  I also bristled at the or the heavy handed discussion about social interactions between children of different ages.  It felt like a kind of story that someone let Rosie's overbearing mother edit for appropriate content.  That made things safe, but not necessarily fun.

Those objections aside, I loved the magical time travel angle and the device of daughter teaching mother in the past (which of course was more famously done in Back to the Future).  I also enjoyed the fact that both Rosie and her mother have synthesia and hear music as color, an idea that has been explored in nother middle readers.