Pack Up The Moon by Kristan Higgins (paperback)

Being a widower is not something Joshua Park ever expected. Given his solitary job, small circle of friends and family, and the social awkwardness he's always suffered from, Josh has no idea how to negotiate this new, unwanted phase of life. But Lauren had a plan to keep him moving forward. A plan hidden in the letters she leaves him, giving him a task for every month in the year after her death. A plan that leads Joshua with a loving hand on a journey through grief, anger, and denial.

It's a journey that will take Joshua from his first outing as a widower to buy groceries...to an attempt at a dinner party where his lack of experience hosting creates a comic disaster...to finding a new best friend while weeping in the dressing room of a clothing store. As his grief makes room for new friendships and experiences, Joshua learns Lauren's most valuable lesson: The path to happiness doesn't follow a straight line.

Funny, sometimes heart-wrenching, and always uplifting, this novel from New York Times bestselling author Kristan Higgins illuminates how life's greatest joys are often hiding in plain sight.