What’s the first book you remember reading? Give us the title, author, date of publication, and your age when you read it. Look it up at Amazon. Is it still in print?
Mine is Stop! Go! Word Bird by Jane Belk Moncure, published in 1981. I was three when I read it. It is no longer in print.
(If you want to leave out any of the information aside from the title, feel free. Especially your age when you read it, as some people may be embarrassed because they started reading especially early or especially late, though I can’t imagine anyone in the litosphere criticizing anyone else based on when they started to read.)