1. Yu.B. Suris. The Problem of Integrable Discretization: Hamiltonian
Approach. Progress in Mathematics,
Vol. 219. Basel: Birkhäuser, 2003. xxi+1070 pp.
The book on the Publisher's site.
2. A.I. Bobenko, Yu.B. Suris. Discrete Differential Geometry. Integrable Structure.
Graduate Studies in Mathematics , Vol. 98. AMS, 2008. xxiv+404 pp.
The book on the Publisher's site. Preliminary version at
arXiv: math.DG/0504358