The third edition of this popular text focuses on major events since 2000, including 9/11 and the war against terrorism, the Iraq War's effect on the UN's relevance, and the Millennium Development Goals. Thoroughly revised throughout, the text also has a new chapter on human security issues that encompasses environmental concerns and global health.
If you're ever interested in learning more about the United Nations, I'd recommend this book. The chapters are structured in a logical way, and the book itself is written so that anyone, even if you don't have previous knowledge of popular IR terms and theories, can understand what is being discussed. The book includes a helpful glossary of definitions, and several pages at the beginning of the book are devoted to the seemingly hundreds of acronyms used throughout the book.
After reading this, I now have a greater understanding of how the UN was formed, the different bodies of the UN and their functions, and the problems the UN faces in the 21st century and how it can combat them.
The makeup of the UN is very confusing, and I am sure I will often return to chapters 2 and 3, which explain how the UN was formed and what the role of the actors are.
I borrowed this book from a friend who used it as a textbook for a class. It does read as such: it is dense with many facts, dates, and names of obscure councils for past UN missions. However, I knew nothing before this about the UN and believe I can now talk about the different parts of the organization with at least some knowledge. Chapters include everything from a brief history and evolution of the UN, to individual chapters on International Peace and Security, Economic Development and Sustainability, Human Rights, and Human Security: Environment and Health. If you need a crash course on the UN, I'd definitely recommend this book.
It's a textbook, but it has everything about the UN structure you could want. If you want more details about the actual organizations under the UN, you will have to find it elsewhere.