>>12750602it's a great field of pure mathematics if you like complex analysis and algebra. The book you have in your pic is useless though. You ought to do an intro to proofs, group theory, and a combinatorics book like Stanley. Then do a grad book on elementary number theory if you want background - Sierpinski's Elementary Theory of Numbers or Davenport's The Higher Arithmetic are both good for this. Don't feel like you need to finish them cover to cover though.
After you feel satisfied, move on to algebraic or analytic number theory as you see fit. If you aren't looking to get into number theory and just want the bare basics as an undergrad, Rosen's book isn't *good* but it'll do the job.
