It's available online in html:

https://developer.apple.com/library/prerelease/ios/documenta...

I assume you'd need a developer account, though.

The book is ePub with no DRM. You don't need an apple device. You could download it on iTunes on windows, and read it with any ePub reader. if you don't want to install itunes i guess you could get a friend to email you a copy.