Conflict of the Inn of Lost Time by Lensey Namioka?

"The Conflict of the Inn of Lost Time" by Lensey Namioka is a middle-grade novel about two siblings who discover an inn where time stands still. The conflict arises when they realize that the inn's magic is gradually fading, and they must find a way to save it before it disappears completely. The siblings must navigate challenges and unravel mysteries to protect the inn and its unique ability.