On this page I will collect links to as many online ereader user manuals as I can find.
If you are trying to decide which ereader you should buy, having a look at the manual can be instructive and might give you that extra little bit of info you need to make an informed decision.
User’s Guides and Quick Start Guides for all of the released Kindle ereaders and tablets, including the Kindle Fire 1 & 2 and Fire HD can be found on Amazon’s Kindle Documentation Page.
Both PDF and AZW formats are available: if you need to update the Guide on your Kindle download the AZW version and sideload it over the USB connection from your computer.
Android 2.3 (Gingerbread) User’s Guide – this link is directly to the PDF download.
Android 4.0 (Ice Cream Sandwich) User Guide (this is for the Galaxy Nexus – all I can find so far).
Nexus 7 Guidebook – at Google Play. This manual for the Nexus 7 tablet also has some details on Android 4.1 (Jelly Bean).
Android 4.1 (Jelly Bean) List of New Features
Barnes & Noble
BeBook manuals and user guides are also available in non-English languages here.
BlackBerry PlayBook Tablet
eLocity A7 (by Stream TV)
Nexus 7 Guidebook (at Google Play)
Kobo’s ereader and tablet manuals are available in a variety of languages, most of which can be found here.
Pandigital Novel ereaders (scroll to bottom of page and select model)
Spring Design Alex
Alex Manual (at the FCC)