[gflyer]

I read a lot of pdf files and Calibre is an amazing tool for managing them on my mac.
But I have a problem when exporting them on my android tablet and import them into Aldiko.
It looks like that Aldiko reads the metadata directly form inside the pdf file (or at least this is my impression).
In fact when I get my files on Aldiko many of them have missing data (for example Author Unknown) and this is very annoying.
Is there a way to tell Calibre to write metadata inside pdfs so when I import them in Aldiko I can see al the info?
I tried also to import in Aldiko via Calibre server, but with the same result.
Any suggestions?
Thank you very much.
g