This work is essentially an update of the authors’ earlier three editions of Criminal Law in Malaysia and Singapore (2007, 2012, 2018) but with one crucial difference. This latest monograph deals only with Singapore, and no longer pairs it with Malaysia. One may justifiably wonder why this separation has taken 57 years more than the political event which created the two independent jurisdictions in 1965. There are two ways of regarding this phenomenon. First, one can attribute this to the near universality and timelessness of the original Indian Penal Code which both Singapore and Malaysia inherited during the days of Empire. Notwithstanding progressively growing divergences in the political, social, cultural and economic contexts between the two jurisdictions, the Penal Code continued to serve both jurisdictions just as well as before. On the other hand, one can lament the failure in both jurisdictions to reform and update the Code for modern times, leaving judges with the unenviable task of pouring new wine in old bottles. Whilst Malaysia has certainly enacted amendments to its Code, it is in Singapore that we have seen a more concerted and comprehensive programme to renovate the Code, culminating in what are perhaps the most substantial reforms in its history in the great amendments of 2019, following upon the rather more modest set of reforms in 2007. The Criminal Law Reform Act 2019 (Act 15 of 2019) was the tipping point and the prospect of a fourth edition encompassing both jurisdictions began to look unwieldy. Thus, was born a new monograph on Singapore alone, and hopefully the first of more editions to come.