Finding the Right Calculus Book for Theory & Problems

[NumberTheory]

I'm looking for a good calculus book which has a good balance of both theory and good problems . Some people think that Piskunov would be a good bet . Is there an English version available online , as an e-book ? If so , could someone provide a link ?

Do you have any other suggestions as to which would be the kind of book I'm searching for ?

 

[Vola]

http://www.abebooks.com/book-search/kw/differential-and-integral-calculus-n-piskunov/

 

[Vola]

https://www.amazon.com/dp/8123904924/?tag=pfamazon01-20

 

[alissca123]

Either Piskunov or Courant would be a good bet