Here's what I've come up with:
- The Lord of the Rings by J.R.R. Tolkien
It's alleged to be the Red Book of Westmarch, which was written by Bilbo and Frodo particularly, but also including selections from Merry's work, Herblore of the Shire (IIRC, my Tolkien books are downstairs).
- The Hobbit by J.R.R. Tolkien
Bilbo's account of his adventures.
- The Diana Tregarde novels by Mercedes Lackey
Not so much for books mentioned in the series, but if my memory isn't playing tricks, the main character is a romance writer.
- Arrows of the Queen by Mercedes Lackey
The book opens with Talia reading a book, and later in the book discusses the size of her father's library in contrast to the palace library.
- Dies The Fire by S. M. Stirling
Numerous Tolkien references, and also as I noted in my first review, some references to Mercedes Lackey's books and other classic fantasy and science fiction. I'm not sure though if I really should be including this one in the list as I can't recall if there's actually anyone ever reading the books in the story - as you can see, it's been a while since I've read it.
- Night Pleasures by Sherrilyn Kenyon
There is one amusing scene in this book where one of the characters phones another one to ask her to do something, saying that she's sure said character is only reading the latest Kinley MacGregor novel - which she is. Where it gets amusing is that Kinley MacGregor is the other name that Sherrilyn Kenyon writes under.
- Time Enough For Love by Robert Heinlein
Quite a few references to characters reading and even to specific books such as the Oz series.
- The Adept series by Katherine Kurtz
I've forgotten just which book has the reference to The Temple And The Lodge - might be the third one, The Templar Treasure - but that's only one of several book references in the series.
- In Her Name: Empire by Michael R. Hicks
There are a couple of scenes where Reza, the main character is discussing the benefits of reading - clearly he's a lover of books.
- Two Crowns For America by Katherine Kurtz
If I'm not mistaken, there's a scene in this one where one of the characters falls asleep while reading.
- The Harry Potter series
I've been reminded about the numerous references to books and reading in this series.
- The Fire Rose by Mercedes Lackey
Mercedes Lackey seems to write a lot of characters that love books, either reading or writing them. I wouldn't mind the library described in this book - but then you could say the same thing about Adam Sinclair's library in the Adept series by Katherine Kurtz.
- Exile's Honor and Exile's Valor by Mercedes Lackey
One of the secondary characters in these two is the Herald-Chronicler Myste. While the chronicles are mentioned in some of the other books, this is the first time we see the one of the Heralds filling the position. There are a couple of reading scenes in these two books as well if my memory isn't playing tricks
- The Blood series by Tanya Huff
Again, if my memory's not playing tricks, one of the main characters is an author.
- So You Want To Be A Wizard by Diane Duane
It's been a while, but I seem to recall that the opening scenes of this book are set in a library. A series of books for kids, but overall a very good read and ties in well with her other two books in the same world: Book of Night With Moon and To Visit The Queen.
- Voyager by Diana Gabaldon
I'm not quite sure if the Outlander series counts as fantasy, however there is time travel in the series, as well as a ghost showing up in one scene. If it does count, you can add at least two more scenes where Jamie Fraiser is found reading - and that's just in the first two hundred or so pages of the book.
- Some of the Pern books by Anne McCaffrey
Although the primary form of teaching and entertainment is through songs, there are still quite a few mentions of reading and writing - if not books, then at least music and song lyrics. Especially true of both Dragonsong and Dragonsinger IIRC - scoring music, copying lyrics and record-hides. The rediscovery of paper comes to mind as well.