The fourth edition of the publication is available on-line and in PDF format from the National Park Service at http://www.nps.gov/plants/alien/ pubs/midatlantic/.

(Excerpted from the publication)
"This fourth edition has been updated, expanded and reorganized to provide more information in a more efficient manner. The book now includes information on 80 species (up from 60 previously) and expanded control guidance. A new section called "Plants to Watch" has been added...Native plant alternatives have been consolidated in a separate section."

MNPS has limited quantities of this book. They are generally available at our meetings.