Thomas J. Jech is a is a set theorist who was at Penn State, but is now at the Mathematical Institute of the Academy of Sciences of the Czech Republic. Wikipedia
The definitive Wikipedia entry for Thomas Jech. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/Thomas_Jech
Multiple forcing, Cambridge University Press 1986 Jech's papers online Most of my papers after 1990 are available online, in both PDF and PostScript form. www.math.cas.cz/~jech/