Hi,
I too like the Calibre addition- it seems to be the best way to add new books, but I have not figured out how to add anything but books to my SD card.
I noticed in Recent reading that it only showed the last thing I had been reading - not several choices like my Aluratek does. Sometimes it shows the page I left, and sometimes it starts at the beginning of the book. After a couple times, I put a bookmark in where I wanted to stop- which did let me get exactly where I wanted to be in the book. I do not understand the inconsistency.
I cannot yet figure how to remove anything from favorites yet either - am researching that

You can- although I agree it is cumbersome - use the U disc to connect the reader to the computer, open the device and look in My Books. There you can delete books.
Rebecca