The table below compares the reference guides in two similar books by Colin Duriez: 1) The C.S. Lewis Handbook: A comprehensive guide (1990 Baker Book House, pp. 246-255) and 2) The C.S. Lewis encyclopedia: A complete guide to his life, thought, and writings (2000, Inspirational Press, pp. 232-240). The entries in the encyclopedia are more complete than those in the Handbook. Both books also contain a bibliography of Lewis and works about Lewis.

Reference Guide: Handbook                         Reference Guide: Encyclopedia

The life of C.S. Lewis Life of C.S. Lewis
The works of C.S. Lewis Works of C.S. Lewis
The literary criticism of C.S. Lewis The literary criticism of C.S. Lewis
The themes of C.S. Lewis The themes of C.S. Lewis
The thought of C.S. Lewis The thought and context of C.S. Lewis
Science fiction [titles listed] Science fiction [titles listed]
The Screwtape letters The Screwtape letters
Till we have faces Till we have faces
Narnia The pilgrim’s regress
The lion, the witch and the wardrobe The great divorce
The magician’s nephew The chronicles of Narnia
  Who’s who in Narnia
  What’s what in Narnia
Prince Caspian  
The voyage of the ‘Dawn Treader’  
The silver chair  
The horse and his boy  
The last battle