Several other Eloise books have been written:

These have been reissued by Simon & Schuster in the last year and a half, along with The Absolutely Essential Eloise, which is the original Eloise book plus a history/scrapbook of the series and of the collaboration between Kay Thompson and Hilary Knight, and Eloise's Guide to Life, a collection of excerpts from the books.

Eloise was also made into a movie at one point, but the movie was not very successful.

Some favorite Eloise lines:

"I am Eloise, I am six."
"Oooo, I absolutely adore room service."