Electrical engineering

Hi -- I'm not sure I understand your request.  Khan Academy is a strictly-online education resource -- there are no physical books associated with K.A.

For electrical engineering lessons (and kudos to you for your interest!  I'm a B.S.E.E., myself), have a visit here: 

https://www.khanacademy.org/science/electrical-engineering

hi i was wondering if you could make a new video on how to make a remote controlled  rock crawler at home. i live in the country and i have very few funding so i cant buy these big expensive kits online and i do not have enough to buy an arduino and stuff but i do have a cheap RC car that works but i cant get it to move in the grass, it doesn't get traction could it be a cheap make with your help? if you could i would greatly appreciate it.thank you for your time.