Who wrote "CASH" (and other financial thriller novels)? I remember it
being a novel about this man who builds a huge financial empire;
random events in the plot include building tennis courts on building
rooftops, and buying a lot of land in South America to form his own
country and try to get the UN to recognize it. Thanks!

"Cash" was written by economist and novelist Paul-Loup Sulitzer.

"French financial wunderkind Franz Cimballi goes from a poor young man
to a multi-millionaire in only four years... Cimballi has nearly
ruined the rich Martin Yahl, and Yahl warns he will take revenge in
kind. To complicate things further, Cimballi tiffs with his wife, in
episodes that seem rather contrived. Yet his ingenuity with coffee
beans, swampland and rooftop real estate (a scheme called Tennis in
the Sky) sparkles. As he at last uncovers the points of attack on his
empire, and his unseen foe brings him closer to bankruptcy, the
adventure becomes exciting."

Amazon.fr
http://www.amazon.fr/exec/obidos/ASIN/225303312X/ref=ase_osmoz/402-9722499-3528134

If you'd like to buy a copy of "Cash" in English, here's a price
comparison:

AddAll.com
http://www3.addall.com/New/compare.cgi?dispCurr=USD&id=116544&isbn=081840406X&location=10000&thetime=20031010124601&author=&title=&state=AK#price

Here you'll find some information about Paul-Loup Sulitzer and his
other financial thrillers:

OsMoz
http://www.osmoz.com/statique/mag/n23/htm/star/starparf.asp

Google Web Search: "cash" + "paul-loup sultizer"
://www.google.com/search?hl=en&ie=UTF-8&oe=UTF-8&q=cash+%22paul-loup+sulitzer

I hope this is the correct book. If it is not, please request
clarification; I'll be glad to offer further assistance before you
rate my answer.

Best wishes,
pinkfreud

Thanks very much!

Please excuse my typographical error in the descriptive heading of the
Google Web Search, in which I have misspelled "Sulitzer" as
"Sultizer."

~pinkfreud