I'll admit coming in, I'm probably a bit prejudiced ... I adored the Sarah Plain and Tall series by this author. This had a very similar feel, in the simple way the story is told, the connection to the characters, the feelings in evokes. I had cleaned out a bookshelf recently and found a physical copy of the book. There is no audio (it is in Kindle). One thing I note in audiobooks, is if a song is "sung" in the book, does the narrator sing it, or patter speak it? Here, I guess we won't know. There were several songs. 
 
There were many things I loved about this story. I found myself making quite a few notes, little things that could be topics of discussion (no plaid dress, the power of words/poetry, "I never fall" "You haven't fallen yet", "It doesn't get any better than excellent", BABY ... double meaning. Memories. What is right ...)

1st person (Larkin's POV)/ Past tense ... there was a little portion in italics before the different sections (four of them: Summer's End, Winter, Spring, Summer-10 Years Later), which were 3rd person. A wispy memory feel ... very effective. 17 chapters. Quick read ... even NOT in audio format.

I think there was a movie made, but I'm not sure it would do it justice (although the movie version of Sarah Plain and Tall did ...)