Lacy Williams’ “Must Love Dogs” is the first book in the “Sweetheart Shorts” series. Micah and Charlotte, who have been friends in the dog park for years, are the main characters of the story. Micah is always willing to lend a helping hand when Charlotte needs it. But then things change when he finds out she needs a make-believe boyfriend. Micah realizes that everything about the relationship could end badly after a fictitious date at her family’s restaurant.