Diophantine Equations see also Diophantine Equation Bashmakova, Isabella Grigoryevna. Diophantus and Diophantine Equations. Washington, DC: Math. Assoc. Amer., 1997. 104 p. $21.95. Beiler, A.H. Recreations in the Theory of Numbers: The Queen of Mathematics Entertains. New York: Dover, 1966. A great place to start learning number theory. Well worth the modest price. $7.95. Carmichael, Robert Daniel. The Theory of Numbers, and Diophantine Analysis. New York: Dover, 1959. An unabridged and unaltered republication of the two works, originally published separately. Out of print. Dörrie, H. ``The Fermat-Gauss Impossibility Theorem.'' Ch. 21 in 100 Great Problems of Elementary Mathematics: Their History and Solutions. New York: Dover, pp. 96-104, 1965. $7.95. Hardy, G.H. and Wright, E.M. An Introduction to the Theory of Numbers, 5th ed. Oxford, England: Clarendon Press, 1979. $42.95. Hunter, J.A.H. and Madachy, J.S. ``Diophantos and All That.'' Ch. 6 in Mathematical Diversions. New York: Dover, pp. 52-64, 1975. $5.95. Ireland, K. and Rosen, M. ``Diophantine Equations.'' Ch. 17 in A Classical Introduction to Modern Number Theory, 2nd ed. New York: Springer-Verlag, pp. 269-296, 1990. $54.95. Lang, S. Introduction to Diophantine Approximations, 2nd ed. New York: Springer-Verlag, 1995. 136 p. $49.95. Mordell, L.J. Diophantine Equations. New York: Academic Press, 1969. $?. Nagell, Trygve. Introduction to Number Theory. New York: Wiley, 1951. 309 p. $19.95. Ogilvy, C.S. and Anderson, J.T. ``Diophantine Equations.'' Ch. 6 in Excursions in Number Theory. New York: Dover, pp. 65-83, 1988. $5.95. Whitford, E.E. Pell Equation. New York: Columbia University Press, 1912.