This document provides an introduction and overview of the contents of a book on the behavior and modeling of concrete-filled steel tubular (CFST) columns and beam-columns. The document outlines 6 chapters that will be included in the book, covering topics such as: the fiber element method for modeling CFST short columns; analysis of uniaxially loaded CFST slender beam-columns; modeling of biaxially loaded CFST beam-columns; modeling the effects of preloads on CFST columns; and modeling the cyclic behavior of CFST slender beam-columns. The document acknowledges contributions from various researchers and expresses thanks for their support.