LOL no there isn't , The fed buys more than half of all treasury issues. China is a net seller, US Households are net sellers, Mutual funds are net sellers, Banks do not buy treasuries.There's plenty of interest in treasuries without the Fed's action (indeed, despite it, since their goal is to lower interest rates).
Foreign treasury investment has been going downhill for the last 5 years.
The problem with spouting things you learned in college from a book is that often that book is out of date and is just plain WRONG.
http://www.ritholtz.com/blog/2011/08/who-is-buying-u-s-treasuries/