Since this
is Skunkworks, I'll posit the following:
Maybe "they" (and we all know
who they are 
) are implanting the pulp they make the pages from with eggs of a genetically engineered
transmission insect.
Seriously though, that is a
very strange thing to have happen but over all I'd say it was a not so unusual coincidence. There are several
types of small insects that live in and off of paper.
Assuming the book was printed and constructed overseas (most are now a days due to cheap labor) it is very conceivable these little critters got in
the paper and sailed across the sea or over the border as eggs in the bindings and hatched.
They wouldn't be able to exit the book until you opened I wouldn't think and thus you have a little "friend" with each reading.
Springer...
[edit on 2-11-2006 by Springer]