Surprisingly Yours by Jessica Marie Holt

The grannies are back and ready for their next challenge!

Julio Rivera is happily unattached, but his family desperately wants him to get serious about his future and his love life. When they find a Match Mavens flyer in a supermarket window, they decide that this mysterious method is worth a try.
Ellie and June are all too happy to help. After all, it’s unnatural—maybe even criminal—for a handsome and charming young man like Julio to be single. Something must be done about it, and they are just the ones to do it.
Julio proves reluctant to give up his slacker ways, and the Mavens must come up with a clever solution for his unique problem—or risk marring their perfect matchmaking record.