Why did he die? ('90 gulf war experimental anthrax vaccine)

[leQ]

Did a former member of North Iowa's 1133rd Transportation Co. die as a result of an experimental anthrax vaccine?
...
Because of Gary Matsumoto's book, "Vaccine A," which alleges a new anthrax vaccine has harmful effects on service personnel, Ardie said she now believes she knows.
...
"Vaccine A" is a book "the U.S. Department of Defense does not want you to read," Matsumoto says in its introduction.

A portion of the book tells Scott Siefken's story.

from the north iowa newspaper Globe-Gazette

has anybody here read this book?