Cambridge Companions are a series of authoritative guides, written by leading experts, offering lively, accessible introductions to major writers, artists, philosophers, topics, and periods.The first two titles in the Companions series were the Cambridge Companion to Shakespeare and the Cambridge Companion to Chaucer, which were both published in 1986 and have since been updated with new editions. Now, over 600 titles have been published with the intention not only to offer a comprehensive overview of their chosen topic, but to display and provoke lively and controversial debate.Cambridge Core hosts the online version of the printed series and includes over 600 Companion titles, over 4,000 essays, as well as bibliographies and further reading. It is fully searchable by author, title, topic, or theme.
A valuable reference resource, Nations of the World: A Political, Economic & Business Handbook profiles every nation and self-governing territory around the world, offering political, economic, and business information in an easy-to-access, single-volume format. Supplemented by maps, charts and tables, this in-depth yet accessible information makes Nations of the World a valuable and sought-after reference, providing researchers with a unique background on every country worldwide.
"PLOS (for Public Library of Science) is a nonprofit open access scientific publishing project aimed at creating a library of open access journals and other scientific literature under an open content license."
It contains free journals of the subjects of biology, medicine, genetics, neglected tropical diseases, computational biology, and pathogens.