Since your interest is in deformation theory I would advise you to have a look at

"Introduction to singularities and deformations" by Greul, Lossen and Shushtin. 

The first part of the book treats complex analytic geometry (complex space germs) and the second their deformation theory. 

There's also a survey paper by Palamodov "Deformations of complex spaces" in Encyclopedia of Mathematics (Springer) which treats some foundational material as well. 

Good luck!