 Number 9: The Search for the Sigma Code by Cecil Balmond, July, 1998
 Three Pearls of Number Theory by Aleksandr Iakovlevich Khinchin, Aleksandra Khinchin, et all February, 1998
 Number Theory and Its History (Dover Classics of Science and Mathematics) by Oystein Ore, Ystein Ore, December, 1988
 Surreal Numbers: How Two ExStudents Turned on to Pure Mathematics and Found Total Happiness: A Mathematical Novelette by Donald Ervin Knuth, 01 January, 1974
 17 Lectures on Fermat Numbers by Florian Luca, Lawrence Somer, et all 08 January, 2002
 Algebraic Theory of Numbers by Hermann Weyl, 20 April, 1998
 Quadratics by Richard A. Mollin, Kenneth Rosen, 24 October, 1995
 Young Children Reinvent Arithmetic: Implications of Piaget's Theory (Early Childhood Education Series (Teachers College Press). X) by Constance Kamii, Leslie Baker Housman, January, 2000
 Contributions to the Founding of the Theory of Transfinite Numbers by Georg Cantor, Philip E. Jourdain, June, 1955
 The Theory of Transformation Groups by Katsuo Kawakubo, December, 1991
