Simply divine. Yes, you can simply divine the meaning of the Oblique Strategy cards by taking a look at the most comprehensive guide that we know of, at Gregory Taylor's wonderful dedicated Oblique Strategies site. Gregory has the complete text of editions 1-4 of the cards, scans, descriptions, history and commentary.
In a chat with garageband (a short-lived online music community site) in September 02000, Brian said: "I still like Oblique Strategies, and I still keep adding to them. And I am planning soon to publish the fifth version of them." It came to pass that a mere 15 months later the Fifth Edition of the Oblique Strategies was unleashed upon an expectant world and made available for purchase direct from Opal at Enoshop.
There was also a very limited Sixth Edition in a burgundy box. Tom claims he has an unboxing video here:
Earlier editions of the Oblique Strategies decks frequently appear at auction at places such as eBay. Prices are generally ridiculous (for buyers) and strangely pleasing (for sellers).