A textbook for modal and other intensional logics based on the Open Logic Project. It covers normal modal logics, relational semantics, axiomatic and tableaux proof systems, intuitionistic logic, and counterfactual conditionals.

"A true life medical thriller . . . If what we want in this moment is insight from this brilliant doctor about pandemics, he wants us to see that they do not occur in isolation." —Carolyn Kellogg, The Boston Globe In 2014, Sierra Leone, Liberia, and Guinea suffered the worst epidemic of Ebola in history. The brutal virus spread rapidly through a clinical desert where basic heal...(展开全部)

In 2000, Tom Zoellner purchased a diamond engagement ring and proposed. His girlfriend said "Yes" and then suddenly, walked out of his life and made Tom the owner of a used engagement ring. Instead of hitting the self-help shelves of his local bookstore, he hit the road travelling to diamond mines in Africa, Canada, India, Brazil, and Russia to discover the true worth of this s...(展开全部)