Charlesbridge, with their brilliant math adventure line, Stuart Murphy, and of course, the great Marilyn Burns. I'd talked with another math author at the time when I was about to send out my manuscript--she told me to contact her publisher (Scholastic's Math Solutions by Marilyn Burns). They really liked Multiplying Menace, but it wasn't quite right for their line. I sent it off to Charlesbridge, and the rest is history.
But what's very interesting is that Multiplying Menace is now a Marilyn Burns book being licensed by Scholastic, and I'm very happy to announce this! It is online in the collection here for 5th graders: Math Reads.
It will also be in the Scholastic Book Clubs catalog.
You just never know--a rejection letter doesn't always mean no. Multiplying Menace proves it.