Santa Just for One Day by Declan Rhodes

When carefree Jack Frost breezes into Noel North’s life, Noel begins to rediscover the holiday spirit he left behind in Yuletide Valley, the charming Christmas town where he was raised. But there’s a catch: Jack is the son of a ruthless businessman plotting to shut down the local hospital and ruin the town’s traditions.
Despite his Jack’s father’s nefarious plans, Noel finds himself falling for Jack. As their affections blossom, Noel decides to embrace his family legacy and don the Santa suit once worn by his late father.
Together with Jack, he races to save the hospital and protect Yuletide Valley’s holiday heritage from profit-hungry developers. With Jack’s father dead set on ruining Christmas, Noel and Jack have only days to pull off a miracle and preserve the town’s magical spirit.