You might like to take a look at the Calibre Companion app available via Google Play (not free but very reasonably priced). It does a great job of managing your books by author, title, series, tags etc and also transferring books to the android device via wifi. It doesn't have its own reading app but it does know about other reading apps on your device, including Kindle for Android. So when you select a book in CC it pops up a list so you can select which app to read with. You can also set a default reading app if you want.
One of the CC developers is chaley, who is also a calibre developer so you can be sure that CC will remain well integrated with your PC version of calibre.
There are numerous threads regarding CC in the Calibre - Devices sub-forum.
P.S. Welcome to MobileRead
