The Sign on Rosie's Door
Author: Maurice Sendak
Illustrator: Maurice Sendak
There was a sign on Rosie's door that said, "If you want to know a secret, knock three times." Kathy, Rosie's good friend, knocked three times and learned the secret -- that Rosie was no longer Rosie, but Alinda, the lovely lady singer.
And soon Kathy and four other children are spirited off by Alinda -- no longer Rosie -- on a set of outrageously funny, highly imaginative adventures.