Ask Engadget: best most 'open' e-book store?

We know you've got questions, and if you're brave enough to ask the world for answers, then here's the outlet to do so. This week's Ask Engadget inquiry is from Arthur, who's considering giving this new-fangled electronic book thing a go. If you're looking to ask one of your own, drop us a line at ask [at] engadget [dawt] com.

"During a recent move, I dumped a dozen boxes of books at goodwill, and have decided to give e-books a try. But what's the most "open" way to buy them? Me and my wife want to share titles (reasonable enough, given that we wouldn't buy two copies from a bookstore). As such, we'd like to open an account somewhere that will let us read on our various computers, PlayBook, iPad and Nook. Is there a store that you can suggest?"

Given your humble narrator's long-held resistance to e-books (and devotion to building a library of their own), this is one we're going to pass straight over to the Engadget community. So, dear friends, what's your opinion?

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