The Sigma Protocol by Robert Ludlum
Paperback 707 pages
This book took me forever to finish reading! Came close to putting it away for good a couple of times, but I usually finish the books I start reading.
The end of the book started going a little overboard with what I call "the bad guy dialogue", as in, I'm going to kill you after I completely explain my evil plan etc.
Love Robert Ludlum's Bourne series, but pass this one up.