"PDQ" wrote in message news:JZQ5e.14831
Since we now have a poster telling us how to decompress the "book" files it
is time for all to be aware that some snakes have been hiding vile things
inside these compressed files.

Of course, one should always be careful when downloading files and should
always have a working up to date virus checker. The major virus checkers are
capable of scanning inside compressed or archived files as they're
downloaded. However, I've not heard of a PDF file being infected.