The Flight of Crow Girl, by J.B. Trepagnier, is the sequel of Crow Girl, by the same author. Although being acquainted with the events of the first book before reading this one is probably a better option, I felt that a reader starting from this second book should not feel too out of sync with the story. The main parts and characters are outlined adequately in the first few pages, so probably new readers won't have a problem catching up.
The story itself is pretty straightforward: Einin, having survived alone in the forest for decades, gradually learns to adapt to the "civilized" world with the help of Liam, Ciaran, and Greta. The plot basically follows two parallel relationships, both emerging, and both facing various difficulties: that between Liam and Greta, and that between Einin and Ciaran - Greta's son.
It is in this latter relationship that most of the interesting moments can be found, as the premise is pretty intriguing: What happens (the story seems to ask) if you take a 36-year-old woman with absolutely no experience in human relationships and place her next to a man her age - and an aspiring musician, to boot? The entire setup reminds the reader of a coming-of-age story, with interesting inputs from Liam and Greta (playing rather successfully the role of the caring-yet-suspicious guardians).
Overall, the story works well, with enough elements to keep the reader's attention. In terms of language, there are no glaring flaws - though perhaps one would wish for a bit more attractiveness in the narrative, with more poetic language, more beautiful descriptions, more intense dialogue. In fact, most areas of criticism probably have to do with genre expectations. Marketing-wise, it's hard to situate the novel - it doesn't feel deep enough to count as literary fiction (despite the potentiality of the setup), yet it doesn't feature any recognizable genre stereotypes either. As it stands, it probably balances somewhat awkwardly between categories, but one could see this as an advantage, adding to the story's general sense of perplexity (having a 36-year-old woman wondering about sex is bound to appear odd, which is good news). Other areas for improvement can be found in the narrative arc of the story, which moves a bit too linearily, without any real tension or problem to be solved (narratively speaking). The only real clash comes in the form of Einin's grandparents who serve (a bit too directly) the role of the threatening outsider, but this is only a temporary distraction. Near the end of the novel, an old girlfriend of Ciaran's also seems to serve the same role, but again the threat is very mild and transient.
Still, when all is said and done, finishing this book will probably leave most readers satisfied - inevitably some more than others, but that's the case with any book. It boils down to personal preferences, after all.