International Law: A Treatise - Volume 1 http://www.gutenberg.org/ebooks/41046Lassa Francis Lawrence Oppenheim (March 30, 1858 – October 7, 1919) was a renowned German jurist. He is regarded by many as the father of the modern discipline of international law, especially the hard legal positivist school of thought. He inspired Joseph Raz and Prosper Weil.
Oppenheim moved to the United Kingdom in 1895, acquiring citizenship in 1900, and lived there until his death.
He first lectured at the London School of Economics and in 1908 became the Whewell Professor of International Law in the University of Cambridge.
He is the author of the internationally renowned International Law: A Treatise, the first edition of which was published in 1905–1906. The work is still considered a standard text of international Law. (Wikipedia)
International Law: A Treatise - Volume 2 http://www.gutenberg.org/ebooks/41047
And also The Future of International Law http://www.gutenberg.org/ebooks/33302
These are huge, but definitive, books on international law. Would really like to see them in the catalog