I found your next book club book. The Leavers won the 2016 PEN/Bellwether Prize for Fiction, given by Barbara Kingsolver to a novel for addressing issues of social justice. The prize, I assure you, was well-deserved.
Lisa Ko's novel follows young Deming and his mother Polly, both Chinese immigrants living in New York until Polly leaves for her job at a nail salon and never comes home. Deming is eventually adopted by a well-intentioned white couple in upstate New York, and The Leavers depicts Deming's struggles with both his adoptive parents and the absence of his birth mother. Told in both Deming's and Polly's voices, The Leavers is slow to start, but ultimately compelling.