This publication is about 600 pages divided into 44 chapters and contains more than 1,300 questions and answers on criminology. Is specially written as reference for everyone to benefit include police, probation officers, prosecutors and lawyers. College, undergraduate and postgraduates up to Master of law level. Some people are reluctant to read the whole book or even chapters to gain the knowledge. But are likely to glance through the questions, chose their interest, then refer to the page for the answers which this book provides. The answers are straight to the point and most of the terminology have been defined or explain to help both lawyers and non- lawyers.This publication attempt to answer many frequently asked questions which include issues on; both national and international crimes, statistic, law enforcement agencies who combat them. some sensitive crimes. countries of high criminal, safe countries, The sources of international criminal laws, How some countries use their military power against weaker nations and then they claim self-defense. Some of the potent crime covered include, drugs, sex, alcohol, tobacco, Hi-tech computer oil, fuel, weapons, human parts and sale, trafficking, types of fraud. I have also look at the psychology of the criminals, youth antisocial/ delinquency, violence, types of properties crime, terrorism, 419, Aggression, Genocide, War crimes, Torture, Drug offenses, Bribery of foreign public officials, Human trafficking, Cyber-crime, Organ trade, Wildlife trade, Blood diamond, Counterfeiting, Illegal mining, Money laundering, Illegal gambling, Arms trafficking, Illegal unregulated and unreported fishing, Illegal logging and much more. Have covered war crime. Botnets, virus, extortion, dos D Dos, ping of death, e-mail bomb intellectual property stealth virus worm, Trojans, adware, pop-up Adware, spyware malware, phishing Spam, social engineering, " man in the middle" spoofing, replay, wireless, Hackers Offender Profiling, autopsy.It also covers international bodies to deal with both national and international crime, Immunity of head of state from criminal activities, The Biggest challenge facing enforcement of international law, some key legal terms in criminology and lot more As result of most of my readers request who have read many of my books, this publication is similar format as some of my academic questions and answers books example The Law" over 1,160 questions and answers which covers most of United Kingdom, Europe, human right and international laws. Financial accounting ( over 1,142 questions) on most areas of financial accounting, and "Love all faiths" about 1,200 questions and answers on about 15 different religious faithsI hope this publication gives invaluable knowledge, but as always, laws are always being in transient, amended, abolished etc. but hope this might lead to research more of one's interest.