[GoldThreader]

I put in 2 different books at completely separate times into calibre. The first one I put onto my device with no problems then, on another day I put on the second book I then proceeded to put it on my device. My device has the correct cover and name for the book but when I open it it has all the pages from the first book. What should I do from here? The two are not listed as a series or anything the only thing they have in common is same author on calibre.