Bookshelf-Your virtual library
SquidBit
tbr
Nathaniel Kessler
Bookmory - 阅读记录, 阅读打卡签到, 读书日历
Tony soft
Amazon Kindle
Amazon Mobile LLC
StoryGraph
The StoryGraph
Google Play 图书
Google LLC
Bookshelf
Vital Source Technologies
Myanmar Bookshelf
Library Myanmar
FBReader Bookshelf
FBReader.ORG Limited
Cambridge Bookshelf
Cambridge University Press & Assessment