I'm looking for a book I had as a child in the 1970s, though the book may be from the 1960s. It was a small paperback with a light blue cover. It was about a cat, I think named Henry, and his mother. The drawings were very simple pen & ink drawings. There may have been a little blue in the drawings too, but mostly I think they were back and white and were simple. The cat was always getting in trouble, and had to be sent to his room. His mom was cooking in the kitchen. They both walked upright - and the mom wore an apron. I think it may have been a series and there were other stories about him.