Covers encoding and binary digits, entropy, language and meaning, efficient encoding and the noisy channel, and explores ways in which information theory relates to physics, cybernetics, psychology, and art. "Uncommonly good...the most satisfying discussion to be found." — Scientific American. 1980 edition.
Here's a sample of other books in this Dover category
The Metaphysical Foundations of Modern Science by E. A. Burtt Classic in the philosophy of science offers a fascinating analysis of the works of Copernicus, Kepler, Galileo, Descartes, Hobbes, Gilbert, Boyle, and Newton, tracing their influence on contemporary scientific thought.
A Concise History of Mathematics by Dirk J. Struik Revised 4th edition covers major mathematical ideas and techniques from ancient Near East to 20th-century computer theory. Work of Archimedes, Pascal, Gauss, Hilbert, etc.
Experimentation and Measurement by W. J. Youden Introductory manual explains laws of measurement in simple terms and offers tips for achieving accuracy and minimizing errors. Mathematics of measurement, use of instruments, experimenting with machines. 1994 edition.
Sundials: Their Construction and Use by R. Newton Mayall, Margaret W. Mayall Clear instructions for constructing a sundial on almost any surface and in virtually any position, with information on materials, Standard Time dials, laying out hour lines, and more. 150 illustrations.