It is an epistolary novel composed of letters of recommendations by an English professor. It does a good job telling its story through a series of LORs.
Schumacher released a follow up novel this year, albeit written in conventional narrative style, that is also good. If you're coming from the first novel, the shift in narration may be jarring.
[0]: https://julieschumacher.com/writing/novels/dear-committee-me...