Book similar to "Basic Mathematics by Serge Lang" I'm looking for a good book for my son, who wants to be a mathematician like me. He is totally into mathematics! Basically what I need is a "Apostol or Spivak for High School Math". What I mean is: I need a "rigorous mathematician's book". I think that "Basic Mathematics by Serge Lang" would be perfect, since I could take a look at it's table of contents and first pages at Amazon, but I cannot find it here in my country. Does anybody knows similar books? THANKS!