Muriel’s Adventures by Melinda Barron

Muriel had no idea being sent to retrieve an important document would shape the rest of her future. Meeting Ewan was not part of the plan but as they work together, they form a friendship that soon develops into much more.
After discovering their talent for solving mysteries, they go on to become successful private detectives. Ewan has his hands full keeping Muriel safe but he finds a way to keep her in line. Their lives might be fraught with danger and intrigue, but love always finds a way…