I tried to use my save from book 2 but it wouldn’t show up, but my save from book one is there. then I played through again twice, the first one worked but sill isn’t showing in book 3 and my next one won’t let me upload to the server. I’m using iPhone.
You have to contact the email support of CoG to check. They could check if the save files are there in your account and hopefully help you out.