From the preface to Look Homeward, Angel:
This is a first book, and in it the author has written of experience which is now far and lost, but which was once part of the fabric of his life. If any reader, therefore, should say that the book is "autobiographical" the writer has no answer for him: it seems to him that all serious work in fiction is autobiographical-- that, for instance, a more autobiographical work than Gulliver's Travels cannot easily be imagined.