I see that a lot of titles that are currently a work in progress have a pre-order for the print version alone. How about adding a pre-order (Early Release) for all eBooks for the eBook version and providing the eBook in its current state and making available updates (through email notifications) whenever the title gets a significant update (including the final publication date)?
There are very few titles marked as "Early Release" on oreilly.com. Compare this to other publishers like Pragmatic Programmers that offer "Beta eBooks" for All books that are a work in progress.
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thanks for your interest in our ebooks. I will definitely pass along your suggestion. We've not really got an elegant solution in place for pre-ordering ebooks at this time but I would imagine that when we can make it a great experience for our customers and us we'd be more than pleased to offer it.
Customer Service Rep,