Ephemerata Crossword Theme: Famous book-folk, fictional and otherwise

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Across
  1. 4. Well-known librarian of the Morgan
  2. 7. Old books ____ friends by Rostenberg & Stern
  3. 8. ___ Wylie, who stars as the perpetual grad student in The Librarian: Quest for the Silver Spear (2004)
  4. 9. Word that appears frequently in these clues
  5. 12. What the LOC gave up doing for Twitter
  6. 16. Focus of the book Placing Papers
  7. 17. Why looking at the book scans online just isn't the same!
  8. 18. Author of Burning the Books
  9. 19. Major ingredient in Dickinson's black cake
  10. 20. ______ book day; April 1st.
Down
  1. 1. Name of computer putting reference staff out of business in Desk Set (1957)
  2. 2. Video game in the woodcut style
  3. 3. ____ posey, party girl who had had a eureka moment with classification
  4. 5. Popular conference for rare book and social collections folk
  5. 6. Frequent subject of rare book social media post
  6. 9. What a bibliophile might say you grab life by
  7. 10. Apple of ____; also well-known social media app
  8. 11. ____ the Librarian, The Music Man (1962)
  9. 13. ____ Name of character who made shouting "I'm a librarian!" into a well-known gif
  10. 14. ______ life. Location of virtual libraries circa the 2000s
  11. 15. Format of this publication