Books

1. Reciprocity Laws. From Euler to Eisenstein
2. The Correspondence between Emmy Noether and Helmut Hasse
3. I was involved in the 4th edition of Algebra I. Körper und Galoistheorie by Falko Lorenz. Additional Exercises can be downloaded from Springer's website.
4. Jacobi's lectures on ''Zahlentheorie und Kreistheilung'' (number theory and cyclotomy) from 1836/37, edited by the late H. Pieper and myself, are available from Rauner Verlag.
5. I also lent a helping hand to G. Frei and P. Roquette in their edition of the correspondence between Artin and Hasse.
6. An introduction (in German) to the arithmetic of quadratic number fields: Quadratische Zahlkörper
7. Neukirch's cohomological approach to Class Field Theory is now available in English (translated by Chip Snyder and myself)
8. Pell Conics. An Alternative Approach to Elementary Number Theory. (2013)
9. Binary Quadratic Forms. An Elementary Introduction to the Arithmetic of Elliptic and Hyper-Elliptic Curves. (2014)
10. Quadratic Reciprocity. Number Theory from Fermat to Gauss, with an Appendix containing an English translation of Baumgart's Thesis. (2014)
11. Correspondence Euler - Goldbach; Euler, Opera Omnia IV, Birkhäuser Verlag Basel (M. Mattmüller, F. Lemmermeyer, eds.), ca. 2014
12. I am also involved in Roquette's edition of the Hasse correspondence