Formal Specification: Techniques and Applications by Nimal Nissanke
Formal Specification provides the reader with a practical and versatile approach to constructing program specifications. It includes both model-based (Z/VDM) and algebraic (CLEAR) paradigms of specification and emphasizes the range of languages and approaches available. Its main advantage over other specification books is that is offers an unrivaled breadth of coverage of the area, encompassing all the recent important advances.