Sometimes I have used Kindle eBook reading device and it’s best due to specially Amazon Kindle eBook reader is compatible with Word Wise Enabled, Screen Reader Supported (as like VoiceView, VoiceOver, TalkBack, NVDA, ALT text), Enhanced Typesetting Enabled which is faster reading with less eye strain with beautiful page layout visibility, Page Flip Enabled, Text to Speech and others modern or advanced technological facilities inbuilt. But most of times I use my smart phone and computer as well to eReading at online & offline.