His sister's best friend is strictly off-limits. But sometimes breaking the rules makes the plot much more interesting ... Bennett Brinkman is San Francisco baseball's golden boy - focused, disciplined, and very bad at ignoring the one woman he shouldn't want. Falling for his sister's best friend was inevitable, even though she's known him since he was an awkward teenager ... and still insists on seeing him that way. Bower knows exactly why wanting Bennett is a terrible idea. She's fiercely loyal to her best friend, and falling for her brother could blow everything up. But when she moves into Bennett's apartment building, and ropes Bennett into their own personal smutty book club, things start to get ... spicy. This romance is strictly forbidden. They're both the last person the other should want. But Bennett has known what he wants from Bower for a long time - and it isn't friendship. And he has a plan to show his sister's best friend that the best ending to their story might be the one she's most afraid to try. As undeniable chemistry turns into deep feelings, Bennett and Bower must decide if risking their family ties is worth chasing the love that's been in front of them all along.