The Pacific Cooperative Studies Unit (PCSU) has partnered with the National Park Service to bring us online versions of a whole slew of paper literature. Most interesting so far, to those studying invasive species, would be the book "Alteration of native Hawaiian vegetation-Effects of humans, their activities and introductions." It includes chapters about the impact on the island of aboriginal peoples, the more recent planting of alien trees, and feral animals. Books and reports are available in .pdf format, and the site promises additional interesting titles are coming soon.
Thanks to a member of the ALIENS-L listserver for sending a link to the site.