The Cat In The Hat Comes Back (1958) is a really great book.
"This was no time for play. This was no time for fun. This was no time for games. There was work to be done. All that deep, deep, deep snow, all that snow had to go. When our mother went down to the town for the day, She said, "Somebody has to clean all this away. Somebody, Somebody has to, you see." Then she picked out two Somebodies. Sally and me."
I can't begin to tell you how many times someone has quoted that around the house "Somebody, somebody has to you, you see." Who should approach these home-alone children once more? None other than the Cat in the Hat. He leaves them to their work while he goes in to take a nice soak in their tub. But he leaves a ring in the tub.
"A ring in the tub!
And, oh boy! What a thing!
A big long pink cat ring!
It looked like pink ink!"
Then begins a long, dramatic attempt to clean up one mess after the other after the other after the other. Before it's all done, we meet many new characters beginning with Little Cat A. It was a fun book that is just a delight to read. Much more fun than the original.