Bitspyder Invite

Hi,

I'm looking for a bitspyder invite. I'm studying aeronautical engineering at uni and alot of the textbooks on bitspyder would really help me with my course, esp. in aircraft design where alot of the study materials are also used by professionals and hence are very expensive (Aircraft design a Conceptual Approach, Jan Roskam's Airplane Design and The Jet Engine By Rolls Royce to name a few). I know whats on the site because my mates a member but hes not got any invites.

PM me please.
TIA,

Nodigity