The Boscombe Valley Mystery
Arthur Conan Doyle
The Life of John Ruskin
W. G. Collingwood
Controlled English for knowledge representation - Doctoral Thesis
Tobias Kuhn
Codes, Ciphers, and Secret Languages
Fred B. Wrixon
The Spectrum of Consciousness
Kenneth E. Wilber
Quest Books (2)
Vatican I: The Council and the Making of the Ultramontane Church
John W. O'Malley