Book excerpt: This book provides a distinctive and critical analysis of the anti-money laundering (AML) measures that have been put in place in Türkiye and the United Kingdom. The work presents a comparative analysis of if, and to what extent, the AML regimes in these jurisdictions are fit for purpose in countering some of the most pressing predicate crimes. It investigates the AML regimes relating to tackling the riskiest/most prevalent predicate crimes, that is, drug trafficking and tax crimes, thereby filling a significant gap within the current literature. The study provides insights into the effectiveness and efficiency of national AML frameworks adopted by Türkiye and the UK in addressing distinct crimes, thereby identifying essential features of an optimum AML ecosystem that could effectively address predicate crimes regardless of their nature. This novel approach offers a detailed analysis of the law in books and law in practice elements of the AML regimes in Türkiye and the United Kingdom which will set the tone for conducting similar studies in other jurisdictions. The book will be of interest to academics, researchers and policy-makers working in the areas of Financial Crime, Law Enforcement and Comparative Law.