Harvard University Press is a big group that makes books. They are kind of like a huge toy factory, but instead of making toys, they make books! The people who work there are called authors, editors, and designers. The authors write the words in the books, the editors check those words to make sure they are right, and the designers create the pictures and layout of the book to make it look pretty.
Harvard University Press is special because they make books that are really smart and helpful for grown-ups who want to learn about lots of different subjects like science, history, art, and more. They also publish books written by professors who teach at Harvard University, which is a very fancy school where people go to learn about lots of different things.
When someone writes a book and wants it to be sent out to lots of people so that they can read it, the author sends it to Harvard University Press. Then, the people at Harvard University Press make sure that the book is printed and sent to bookstores so that people can buy it and read it!