What is it? Where is it?

It is / was a special event where you would turn in books in exchange for points. You can / could spend the points here. The last reading drive was on a few months ago. As far as I know there are no plans to have another one :(

oh cool and where would you usually turn them in?

The page where you turned them in gets re-directed to the prize shop now. http://subeta.net/games/reading_drive.php is the URL

ooh i do hope they do another one it would be fun haha thank you so much :)

There will definitely not be another "reading" drive. But maybe a drive for different items. No one's sure yet. No problem :)