Gert-Martin Greuel/Christoph Lossen/E. Shustin: Introduction to singularities and deformations. Springer 2007, 470p. Eur 70. 21702 Robin Hartshorne: Deformation theory. Springer 2010, 230p. Eur 61. 21705 Werner Kleinert: Review of the book "The geometry of moduli spaces of sheaves" by D. Huybrechts and M. Lehn. Zbl. 0872.14002 (ca. 1999), 3p. 21706 Werner Kleinert: Review of the book "Fundamental algebraic geometry" by Fantechi/.../Vistoli. Zbl. 1085.14001 (ca. 2006), 3p. 21704 Werner Kleinert: Review of the book "Deformations of algebraic schemes" by E. Sernesi. Zbl. 1102.14001 (ca. 2007), 3p. 21709 Edoardo Sernesi: Deformations of algebraic schemes. Springer 2006, 340p. Eur 30.