The combination of a metal with another metal or nonmetal is known as an alloy. The resulting substance has properties which are often different from the original materials. The new material might have increased strength or toughness while still retaining all the characteristics of metals such as electrical conductivity, ductility and opaqueness. A defining feature of alloys is their metallic bonding character. Based on the arrangement of atoms in an alloy, they are usually classified into two types- substitutional alloys and interstitial alloys. Brass and bronze are examples of substitutional alloys while steel is a form of interstitial alloy. Stainless steel is an alloy which is a combination of substitutional and interstitial alloys. Some of the diverse topics covered in this book address the varied branches that fall under this category. The extensive content of this book provides the readers with a thorough understanding of the subject. It is meant for students who are looking for an elaborate reference text on alloys.