That's My Adventures with Superman by Kathryn Ann Kent.

Quote
"Auntie Lois!" The little bundle of energy that Lois called a nephew came rushing into her office.

"Hey, Sammy, what's up?"

Lois smiled at the grinning little boy as he hugged her leg. Lois glanced up to see her sister, Lucy, step through the door. Lucy leaned against the door jamb. She seemed
worn out, but then it was quite a chore trying to keep up with her exuberant five-year old.

The little boy looked up at his favorite aunt. "We went to see Grampa Sam today. Did you know that he saved Sooperman's life once?"
Saskia

I tawt I taw a puddy cat!