how many cloud readers do you know?

[Ilya]

I have some e-books on my PC. And I want to read them and synchronize reading progress on many devices (ios, android, windows7). I don't want to buy books.
I know just kindle cloud reader and Bookmate
In kindle I can't read my book on PC, only on ipad and samsung. Bookmate has wide margin.
Please, tell me more free cloud readers

[cathugger]

Kindle has free ereader software and apps for PC, Mac, Android and iOS tablets and phones, plus Blackberry and maybe more. You can read Kindle books on a PC witht heir software reader. You can also use their online cloud reader at read.amazon.com (it installs a plug-in so you can log into your Amazon account and view your Kindle cloud i.e. all of the Kindle books you've bought AT Amazon)

However, when you buy the Kindle book it is only sent to the one registered device or app you select. You can go to the Manage Your Kindle page at Amazon and send the book to other Kindle devices/apps registered to your account. Only exceptions I know of are big textbooks (can only be sent to Kindle readers on PC or tablet) and some publishers limit the number of devices you can load your purchased ebook onto.

I only know the Amazon cloud reader and cloud player (for music) and whatever they call the video one. Amazon's readers will sync your bookmark between devices as well as the list of books you own (that's the other way to download to multiple devices - click the book title in the app or Kindle device's Archive or Cloud list to download the book to the device). I believe this will only work with Kindle books purchased at Amazon. Any you get elsewhere you need to manually load onto other devices/apps and I don't think your bookmarks in those will be synced.