> > What is an ex-library book? What does it mean?
http://for.theloveofbooks.com/2009/04/how-to-clean-and-repair-ex-library-books/
> A book that used to belong to a library.
More exactly, this book (as categorized in the book trade, e.g. catalogues
of second-hand books) has visible marks that show it was formerly
in a library, not necessarily an institutional library. Books with
personal book plates are usually classed as ex-library, while
those in which an owner wrote his name are usually not. The
traditional lettering is "Ex libris" meaning "From the books of"
some named person (or organization.)

Signature
Don Phillipson
Carlsbad Springs
(Ottawa, Canada)