I would consider buying the following math books, provided that they are moderately priced (older editions, used, etc.):
1. Gelfond, A.D and Yu.V. Linnik, "Elementary Methods in Analytic Number Theory", Rand McNally, Chicago, 1965 2. Ribenboim, P., "Algebraic Numbers", Wiley, N.Y.,1972 3. Apostol, T.M., "Introduction to Analytic Number Theory", Springer, N.Y., 1976 4. Sierpinski, W., "Pythagorean Triangles", ?, N.Y., 1962 5. Infeld, L. " Whom the Gods Love", ?, 1948 ( story of Evariste Galois). 6. Rotkiewicz, A., "Pseudoprimes and their Generalization", Univ. Novi Sad, 1972 ( in English, probably just a report) If you have any of these books and are willing to part with them without ruining my bank account, please get in touch via the e-mail.