"This is an excellent text for reaching students of diverse backgrounds and majors, as well as scientists from other disciplines (physics, economics, finance, and engineering) who want an introduction in functional analysis." (MAA Reviews, October 9, 2008)

"It is written in a very open, nontelegraphic style, and takes care to explain topics as they come up.  Recommended." (CHOICE Oct 2008)

"This is an excellent text for reaching students of diverse backgrounds and majors, as well as scientists from other disciplines (physics, economics, finance, and engineering) who want an introduction to functional analysis." (MAA Reviews Oct 2008)