The second volume contains chapters on graph theory and combinatorics, extremal and Ramsey theory, and a section on infinity that covers Erdős' research on set theory. All of these chapters are essentially updated, particularly the extremal theory chapter that contains a survey of flag algebras, a new technique for solving extremal problems.
Ronald L. Graham is currently Professor of Mathematics and Irwin and Joan Jacobs Professor of Computer and Information Sciences at the University of California, San Diego, and Chief Scientist at the California Institute for Telecommunications and Information Technology.
Jaroslav Nešetřil is currently Professor of Mathematics and Director of the Institute of Theoretical Computer Science at Charles University, Prague.
Steve Butler is currently Assistant Professor of Mathematics at Iowa State University.