@Lustig Andrei,
Huge influence.
He was also a sort of family friend, which I don't want to get into too much, but mention because I had enough of a connection to him that I was a little surprised when I got older and realized that he was a big deal to a whole lot of people. It's like when your neighbor down the street makes really good cookies and you enjoy them, and then you find out that she owns an international chain of cookie shops.
"In the Night Kitchen" is the one that had the biggest individual impact on me, as it was my big present (a new hardback) when I went to the hospital to have my tonsils out at age 4 or so. There's a certain floaty dreaminess in the book that really resonated with that experience. It still brings things back when I read it now.
"Higglety Pigglety Pop" was another that was first read to me about ten thousand times and then I read on my own another ten-twenty thousand times, -- one of the first books I read on my own. Later I obsessed over the illustrations.
That's definitely another big influence, the whole old-fashioned crosshatching technique, which I've used a lot.
Then also I worked in a used bookstore for a while and wrote all of the section labels ("Mystery," etc.) in "Maurice Font" (that's what I called it in my head, a certain kind of lettering he used in many of his titles and text within the illustrations).
"Little Bear" was the big one for reading to my own kid, I read all of the classic books many, many times, but Little Bear was the champion, I can probably still recite swaths from memory. (He didn't write it, but illustrated.) And was one of the first things that sozlet read on her own.