Sources for card magic at every stage

In a previous post, I asked what the people here want to get from r/magic. A lot of responses expressed a desire to learn magic. I intend to get around to making more posts about other topics in the coming weeks, but I have to start somewhere. Since I'm primarily a card guy, I'll start with this! I'll either compile the responses to add to an FAQ, or I'll link directly to this thread in the sidebar of r/magic.

What are some titles of resources for learning card magic? Along with a title, please post why you think it's a good resource and what skill level it would be for. Example:

The Classic Collection (book, in two volumes) by Harry Lorayne is for people with a small amount of experience with cards. It's not good as an introductory text since Harry often says things like, "use your favorite false cut." He does teach some sleights in the series - some double lifts, false cuts, forces, and a few other moves - but this book isn't about learning movies; it's about using them. These books are filled with effect after effect. Most of the content was original published by Harry in the 60's, but he's added commentary for how the effects have been used over the decades and how they've evolved. He also credits other magicians' ideas and references similarities between his work and that of some other magicians in case you want to research more about those ideas.

He teaches a wide variety of concepts, from self-working to requiring perfect faros, from math-based to force-based. You're not going to use everything from the book in the real world, but you'll probably learn a lot of things that you like.