I rather enjoyed Joseph Cummins "Great Rivals in History: When Politics Gets Personal" as it takes a bit of a different approach to history. Cummins takes on 24 pairs of individuals who were either at cross-purposes or competing for the same goal. Some of them were friends before becoming competitors, some were family, many were natural foes, but quite a few should have been allies but for their own personal ambitions.
Each chapter of this book takes on one pair of historical figures that in some way were rivals, whether for world domination, as is the case with Alexander the Great and King Darius III; political power, as is the case with Benjamin Disraeli and William Gladstone; or perhaps for History, such as George S. Patton and Bernard Law Montgomery. These rivals may be trying to achieve victory for their countries and themselves, such as Charles XII of Sweden and Peter the Great of Russia, or for power within the same country, such as John F. Kennedy and Richard M. Nixon.
The discussions of these 24 rivalries are arranged pretty much in chronological order, though certainly some of them overlap significantly, especially in those from the 20th century. These discussions are summaries of these contests contain both a brief history of the events for which they are known, but also partial biographies of the two competitors. By no means are these intended to be complete discussions of any of these topics or of the participants. Rather it serves as an introduction which whet's the appetite for deeper study. One could use this as an overview for those who don't have the time or interest to delve deeper into these events, but I wouldn't recommend it as they are a bit sparse for that.
This book is very readable and enjoyable, and I do recommend it. I do wish it were a bit more comprehensive in many areas, and I was a bit disappointed in the bibliography which does not contain as many references as I would like, and in fact there are fewer references than there are rivals under discussion. This book rates near 3½ stars from me, but I am rounding down to 3 stars.