Scandal Amidst the Stacks by Sandra Sookoo

One glance through the window of a book shop changes their lives forever.

Major Cornelius Montgomery is suffering from ennui since his days in the military are over. Just turned forty, he is searching for something meaningful to fill his life, for empty romantic liaisons and scandalous pursuits have lost their charm. One February evening, he peers into a bookshop for a glimpse of the only woman who’d managed to capture his heart, but she is off limits because she’s his best friend’s sister. Does it matter?
Lady Penelope Needham—the Marchioness of Weymouth—is searching for purpose. Her husband proved sterile, which thwarted her dream of being a mother, then he died in a hunting accident, leaving her widowed at the age of thirty. To keep busy, she happily works at a book shop because books are old friends and they never disappoint, yet when she happens to glance outside one cold night and spies an old crush—her brother’s best friend—life has the potential to change. Doesn’t it?