Children's Fiction Books Bestseller List for May 23, 2002 from sales the week ending May 19 For the Book Sense store nearest you, call 1-888-BOOKSENSE or visit www.booksense.com   CHILDREN'S FICTION BOOKS   1. Lemony Snicket: The Unauthorized Autobiography Lemony Snicket, 0060007192, HarperCollins, $11.95.   2. Artemis Fowl: The Arctic Incident Eoin Colfer, 0786808551, Talk Miramax/Hyperion, $16.95.   3. Harry Potter & the Prisoner of Azkaban J.K. Rowling, 0439136369, Scholastic, $7.99.   4. Star Wars: Episode II, Attack of the Clones Patricia C. Wrede, 0439139287, Scholastic, $5.99.   5. The Bad Beginning Lemony Snicket, 0064407667, HarperTrophy, $9.95.   6. Harry Potter & the Chamber of Secrets J.K. Rowling, 0439064872, Scholastic, $6.99.   7. Artemis Fowl Eoin Colfer, 0786817070, Talk Miramax/Hyperion, $6.99.   8. Princess in the Spotlight Meg Cabot, 0064472795, HarperCollins, $5.95.   9. The Adventures of Super Diaper Baby Dav Pilkey, 0439376068, Blue Sky, $4.99.   10. Harry Potter & the Goblet of Fire J.K. Rowling, 0439139597, Scholastic, $25.95.   11. Stargirl - Debut; 76 Pick Jerry Spinelli, 037582233X, Knopf, $9.95.   12. Because of Winn-Dixie Kate DiCamillo, 0763616052, Candlewick, $5.99.   13. Harry Potter & the Sorcerer's Stone J.K. Rowling, 059035342X, Scholastic, $6.99.   14. Knocked Out by My Nunga-Nungas: Further, Further Confessions of Georgia Nicolson - Debut Louise Rennison, 0066236568, Avon, $15.99.   15. Stage Fright on a Summer Night Mary Pope Osborne, 0375806113, Random House, $3.99.     ON THE RISE   35. Loser Jerry Spinelli, 0060001933, Joanna Cotler Books/HarperCollins, $15.99. New book from indie favorite Spinelli; a 76 Pick.   The Book Sense Bestseller List is copyrighted and cannot be reprinted without permission from the American Booksellers Association. For information, please contact Mini Dhingra, Manager of Information Services, at: (914) 591-2665 ext. 1278, 828 South Broadway, Tarrytown NY. Reprint Guidelines.