The book - my first in the series 'History in an Hour' - is probably a very sensible way to start getting your bearings on the Vietnam conflict, if you were largely ignorant of it before, and it may equally well work for somewhat younger readers, to give them a high level overview.
In the 73 pages one naturally cannot squeeze much detail but most issues are covered in at least a handful of paragraphs. After a general introduction the book starts with a section on the French rule and the first Indochina war, then proceeds with the American intervention in the Eisenhower era up to 1963, the JFK intervention, the escalation under Lyndon B. Johnson, the Tet offensive, the final years of the campaign under Nixon, some comments on the US strategy to waging the war, the evolution of the US domestic oppostion, and a summary of the NVA and Vietcong forces. The book is finished off by two appendices, one on the key players in the conflict (personalities, not nations), and one with a timeline of the war.
As said the book remains light on the details but does provide soundbites so a reader new to the topic can place issues such as burning monks, Hamburger Hill, My Lai, the Tet Offensive, the Linebacker bombing campaign and search and destroy on a virtual map of the conflict.
The writing is pretty good and is enriched with a selection of period photographs (which depending on your perspective may be taking rather too much space).
So overall a good first read but hardly doing justice to one of the most important conflicts of the Cold War, so likely to leave you wanting more after you are done with it.