Book excerpt: This book is an essential companion to any criminal or immigration lawyer who wishes to better advocate for his client by humanizing the individual and presenting important psychosocial details from the client's life, which will also impact on the factual analysis of the case. (Revised 5th Edition) Both experienced and novice lawyers will glean important insights into criterion to consider for pre-sentence memorandum of law, all immigration cases, mitigation factors, challenges posed by difficult clients, heuristics and biases in the judicial system, the benefits of mitigation consultation, factual analysis, and related matters in the advocacy process. Ultimately, this book will fill in the gaps left out in law school, such that the lawyer will more accurately understand his client's needs, and the lawyer will be equipped with the tools to proceed in a professional manner.