Charlie Anderson paperback

Charlie, a fuzzy gray cat, walked out of the woods one evening and into Elizabeth's and Sarah's hearts. Now he sleeps on their beds, lets them dress him up in doll clothes, and laps up warm milk on chilly nights. But where does Charlie go during the day?
It's not until a storm keeps Charlie away one night that the two sisters discover his other, daytime, home. But maybe that's not such a bad thing. Because, just like Elizabeth and Sarah, Charlie has two houses, two beds, and two families who love him very, very much!