Multigrid
"...Multigrid is a useful book in many respects. It gives a clear introduction to the student, it is a handbook for the practitioner, and for the expert it is a good reference and a nice compilation of knowledge..." - Pieter W. Hemker in SIAM Review, Vol. 44, No. 1, 2002"Multigrid is easily the best practical textbook in existence on multigrid methods...it represents a comprehensive guide with numerous valuable suggestions, warnings and hints which could previously have been learned only with direct contact with experts..." - Irad Yavneh in ZAMM- Journal of Applied Mathematics and Mechanics 83, No.11, 2003