I just hit 300 pages! (O’Reilly has a nice system where it automatically compiles my XML into a PDF, so I can obsessively check page count). The last edition topped out at just over 200 pages, which was nice: you could actually sit down and read the thing in a reasonable amount of time and not have your lap fall asleep.
I don’t think this edition is going to be small enough to do that because MongoDB itself has gotten bigger. I couldn’t cover all of the things a developer needs to know in less than, well, 300 pages (and I’m not even close to done). I feel like Mike and I did a good job covering MongoDB two years ago (I’ve had to change almost nothing in the first few chapters), but it’s just a larger product now.
Finally, thank you to everyone that sent me schemas! I got a lot bigger response than I expected and I’m running way behind on getting back to people, so I’m sorry if I haven’t emailed you back yet! However, I really appreciate all of your contributions.
Kristina Chodorow's Blog 
Continious Integration for authors FTW! Does it have spelling and grammar check code coverage?
BTW I’ve never had my lap call asleep. Perhaps you should altar your reading posture.
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Unfortunately it does not have a spell check and the XML editor doesn’t automatically spell check, which has led to some embarrassing copyedits.
There are a limited number of postures you can use when you’re reading in certain… locations.
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