The book is suitable for a graduate course on iterative methods for linear systems with applications to optimization and fluid dynamics.
In 2015 I taught an accelerated graduate-level course at the university of Louvain-la-Neuve (Belgium) describing optimization methods that lead to quasi-definite linear systems. The course material is available here.
Head to the SIAM Bookstore to get your copy of the book!
Update: here is a list of errata.