Recurring characters with three or more appearances, and every book they turn up in.
47 books by Agatha Christie
33 books by R. A. Salvatore
28 books by Donna Leon
28 books by Arthur Conan Doyle
24 books by Robert E. Howard
24 books by Michael Connelly
24 books by Sue Grafton
23 books by Donna Leon
21 books by R. A. Salvatore
21 books by Donna Leon
20 books by Andrzej Sapkowski
18 books by R. A. Salvatore
18 books by Arthur Conan Doyle
18 books by Lee Child
18 books by Agatha Christie
17 books by R. A. Salvatore
13 books by Jo Nesbø
13 books by Donna Leon
13 books by Kathy Reichs
12 books by Donna Leon
12 books by Arthur Conan Doyle
12 books by R. A. Salvatore
12 books by Rick Riordan
12 books by Robert Jordan
11 books by Andrzej Sapkowski
11 books by Terry Pratchett
11 books by Henning Mankell
10 books by Laurell K. Hamilton
10 books by R. A. Salvatore
10 books by Clive Cussler
9 books by Lincoln Child
9 books by Douglas Preston
9 books by Robert B. Parker
9 books by Raymond Chandler
8 books by Marion Chesney
8 books by Terry Pratchett
8 books by Steve Berry
8 books by Tom Clancy
8 books by Andrzej Sapkowski
7 books by Lucy Maud Montgomery
7 books by C. S. Lewis
7 books by Robert Jordan
7 books by Orson Scott Card
7 books by Robert Ludlum
7 books by Terry Pratchett
7 books by Terry Goodkind
7 books by Charlaine Harris
6 books by Rick Riordan
6 books by Orson Scott Card
6 books by Andrzej Sapkowski
6 books by Stephen King
6 books by J. K. Rowling
6 books by Tom Clancy
6 books by Dan Brown
6 books by Robert E. Howard
6 books by Terry Pratchett
5 books by Terry Pratchett
5 books by Rick Riordan
5 books by R. A. Salvatore
5 books by Louise Penny
5 books by J. K. Rowling
5 books by Lucy Maud Montgomery
5 books by C. S. Lewis
5 books by Robert E. Howard
5 books by Isaac Asimov
5 books by Robert Crais
5 books by Stephen King
5 books by Patricia Cornwell
5 books by Michael Connelly
4 books by J. K. Rowling
4 books by Kurt Vonnegut
4 books by Michael Moorcock
4 books by Christopher Paolini
4 books by Isaac Asimov
4 books by Timothy Zahn
4 books by Rick Riordan
4 books by R. L. Stine
4 books by Orson Scott Card
4 books by Philip Pullman
4 books by Lucy Maud Montgomery
4 books by Lawrence Block
4 books by C. S. Lewis
4 books by Stephen King
4 books by H. P. Lovecraft
4 books by Elmore Leonard
4 books by Andrzej Sapkowski
3 books by George R. R. Martin
3 books by Stephenie Meyer
3 books by R. A. Salvatore
3 books by C. S. Lewis
3 books by Lucy Maud Montgomery
3 books by Stephen King
3 books by Rick Riordan
3 books by J. R. R. Tolkien
3 books by Daniel Silva
3 books by Lincoln Child
3 books by Douglas Preston
3 books by Arthur C. Clarke
3 books by Brandon Sanderson
3 books by Mark Twain
3 books by Orson Scott Card
3 books by Arthur Conan Doyle
3 books by Suzanne Collins
3 books by Robert E. Howard
3 books by Anne Rice
3 books by Stieg Larsson
3 books by J. K. Rowling
3 books by Isaac Asimov
3 books by Philip Pullman
3 books by Lois McMaster Bujold
3 books by Michael Moorcock
3 books by Agatha Christie
3 books by Elmore Leonard