Real Analysis and Abstract Algebra textbooks at http://www.mth.pdx.edu/~erdman/ http://www.mth.pdx.edu/~erdman/. Both textbooks were written by John Erdman und

Real Analysis and Abstract Algebra textbooks at http://www.mth.pdx.edu/~erdman/ http://www.mth.pdx.edu/~erdman/. Both textbooks were written by John Erdman under a creative commons non-commercial license. They were recommended to me by a math professor and both books are really high quality.