@above person

simply click on the link and downloading will started if u have pdf application installed on your tablet, if you have apple tablet it will open pdf file, then an option on right side will ask you want to open in ibook, kindle, etc, slect any one your file simpy go there, but you must installed first any 1 application for pdf/book storage, like kindle, ibook,
if have some other tablet, then the downloaded file go to file manager