1-9 of 9 Books

Essence of Z (Prentice-Hall Essence of Computing)
By Ed Currie

An introduction to formal specification and Z
By Ben Potter

Formal Specification Using Z (Computer Science)
By David Lightfoot

Formal Specification and Documentation Using Z
By Jonathan Bowen

An introduction to formal specification with Z and VDM
By Deri Sheppard

The Z formal specification notation
By Jonathan P. Bowen,Michael G. Hinchey