Hi there,
First, i've to apologize because i'm french and my english is not so good!
But I'll try to be easy-to-follow...
I've recently started using Calibre Companion on my Shield Tablet.
On my PC i manage my collection with Calibre and i use "Start content server" to get some of my books on my tablet.
At the beginning it was great but now that i have more than 400 books on my tablet (but is that the reason?? I use CC for 3 weeks) i have a big problem : Some books don't get on my tablet... When i'm connected, it seems to be ok (there is a cross in front of the choosen book so i imagine i'll find it on my tablet but... not everytime!).
And sometimes the book is in my tablet library but at the next connection, it disappears...
I hope you'll understand me, thanks for trying!
Ristobop