Any good books on string theory

[FatalTragedy]

Not sure what section to put this in, so I'll put it here. Are there any good books on string theory that are good for someone who is a bit more than a layman (i.e. no extremely superficial, dumbed-down stuff), but still doesn't know more than single variable calculus and Newtonian mechanics?

 

[Trigonal]

Try this one? https://www.amazon.com/dp/0691142890/?tag=pfamazon01-20
You can also try anything by Brian Greene, those are quite good.