Love Among the Stacks by A.D. Brazeau

Lucy Bennet knows one thing for sure – she will never date again, not as long as she lives. There will be no more men, not after her ex-husband demolished her ability to trust. Living for her two teenage sons, her career as an interior designer, her sister, Marlowe, and best friend, Iris, is all she wants to do.
When Page Turners, the local bookshop owned by Marlowe’s boyfriend, is threatened by a new warehouse bookstore, Lucy decides to enter a scavenger hunt to win the prize money, helping herself, and Page Turners at the same time – only she needs a partner.
Reed Mathews, the gorgeous Page Turners clerk, turns the head of every woman who walks into the store. Every woman that is except Lucy Bennet’s. When Reed becomes Lucy’s best option for a partner, sparks fly, whether she wants them to or not.