Catching Fire
The first in a trilogy is called the "first installment" or "first book" of the series.
The third book in the Perfect Chemistry trilogy is called "Chain Reaction."
Catching Fire The third book is Mockingjay
The third book in the Hunger Games Trilogy is Mockingjay, which will be released on August 24 of 2010. The author is Suzanne Collins.
The Beating of His Wings
An American Trilogy - book - has 304 pages.
The ISBN of An American Trilogy - book - is 978-0306814754.
It came out in May 2011.
An American Trilogy - book - was created on 2009-03-23.
The third book in the Gideon Trilogy will be The time Quake. The release date is set for the 6th October 2009 in America and it can be pre-ordered at amazon.com (see links)
There is no fourth book. The series is a trilogy, which means only three books.
Mockingjay is the third and final book in the Hunger Games Trilogy.