Looking for a book i read once. Don’t know the title. Please help me find it

book written by female author. main character a young woman who works her family's gallery. the Goodnight Gallery. Goodnight is their last name. their most famous art was a folk artist by a man called Homer. his signature art had checkered skies. romance novel. turns out Homer never existed, it was grandmother Goodnight who created the paintings. And i think there's an art thief as well, the romantic interest, maybe, but i remember the romantic interest was not exactly a law abiding citizen. It was a fun beach read and I recall the cover was light yellow.