The focus of Assertion-Based Design, Second Edition is three-fold: To support these three over-arching goals, we showcase multiple forms of assertion specifications: Accellera Open Verification Library (OVL), Accellera Property Specification Language (PSL), and Accellera System Verilog. The recommendations and claims we make in this book are based on our combined actual experiences in applying an assertion-based methodology to real design and verification as well as our work in developing industry assertion standards. Differences between the first edition and the second edition include: