J. K. Rowling's Harry Potter and the Goblet of Fire (Bloomsbury; 636 pages) would have sold millions of copies had its publishers simply dumped them in bookstores, unannounced, and then got out of the way as word of mouth spread among stampeding Pottermaniacs.
2007, Bernard Cova, Robert Kozinets, & Avi Shankar, Consumer Tribes, Butterworth-Heinemann (2007), →ISBN, unnumbered page:
The launch of the fifth book, for instance, involved only one personal appearance, when JKR read extracts to 4,000 carefully selected Pottermaniacs in the Albert Hall.
If you are a Pottermaniac, this is the month for you. "Harry Potter and the Order of the Phoenix" opens today, and on July 21 the seventh and final Potter tome lands with a thud at your local bookstore.
Noun: "one who loves Beatrix Potter and her works"
1994, Paula Weidegar, Gilding the Acorn: Behind the Façade of the National Trust, Simon & Schuster (1994), →ISBN, page 366:
In Beatrix Potter's village, Near Sawrey, half the houses - including her own - belong to the National Trust. This has successfully prevented Near Sawrey from becoming a fiesta for Pottermaniacs.