The K-book: An introduction to algebraic K-theory by Charles Weibel
Publisher: Rutgers 2010
Algebraic K-theory is an important part of homological algebra. From the table of contents: Projective Modules and Vector Bundles; The Grothendieck group K_0; K_1 and K_2 of a ring; Definitions of higher K-theory; The Fundamental Theorems of higher K-theory.
Mathematics Geometry & Topology Algebraic Geometry K-theory