Days at the Morisaki Bookshop by Satoshi Yagisawa

 This is a sweet story set in Japan about a young woman with a broken heart who moves in with her eccentric uncle and helps him run his secondhand bookshop, which sets her life off on a more positive path. Takako joins her uncle Satoru after she finds out her boyfriend has been duplicitous. Satoru can relate because the love of his life, Momoko, had up and left him with no explanation. Eventually her ex and his wife both reappear, upsetting the equilibrium the two had found in their lives. It's a quick read with appealing characters--and you do hope they both find true love that lasts.