Original sentence: About Richard Preston.His objectivity seems unquestionable.It was written by journalist Richard Preston, also author of the best-selling book The Hot Zone (1994), about outbreaks of Ebola virus in Africa and Reston, Virginia and the US government's response to them.The 9/11 attacks and the anthrax letter incidents (called "Amerithrax") , both in 2001 inspired the author to write this book, so he interweaves them with the smallpox material resulting in multiple storylines, which are all eventually resolved.The Demon in the Freezer (2002), subtitled   A True Story, is a terrifying, non-fiction book on the biological weapons (BW) agents  smallpox and anthrax and how the American government  develops defensive measures against them.The author's depth of research journalistically is superb, and he backs it up with specific references.The book is primarily an account of the Smallpox Eradication Program (1967-80), the ongoing perception by the U.This approach may confuse some readers initially
Edited sentence: However, the writer was overtaken by events – the 9/11 attacks and the anthrax letter incidents (called "Amerithrax") , both in 2001  --  and so much of the book interweaves them with the smallpox material in a somewhat disjointed manner.It was written by journalist Richard Preston, also author of the best-selling book The Hot Zone (1994), about outbreaks of Ebola virus in Africa and Reston, Virginia and the US government response to them.The Demon in the Freezer (2002), subtitled   A True Story, is a non-fiction book on the biological weapons (BW) agents  smallpox and anthrax and how the American government  develops defensive measures against them.The book appears to have been started as an account of the Smallpox Eradication Program (1967-80), the ongoing perception by the U