Karina Schaapman built the Mouse Mansion by hand: a vast, intricately furnished dollhouse populated by dozens of tiny mice, each with their own story. The books that grew from it follow Sam and Julia through a neighborhood that feels genuinely lived in, full of bakers and neighbors and small everyday dramas. What makes Mouse Mansion so captivating is the scale of the imagination behind it, the sense that every corner of every room has been thought about, that this world exists completely whether or not anyone is looking. This collection brings together books, gifts, and keepsakes for children and families who love to lose themselves in a world like that.