Charles Weibel, An introduction to homological algebra, Cambridge Studies in Adv. Math. 38, CUP 1994
Charles Weibel, The development of algebraic K-theory before 1980, published in Algebra, K-theory, groups, and education: on the occasion of Hyman Bassâ€™s 65th birthday, a volume of Contemporary Mathematics, American Mathematical Soc, 1999.