It is with disappointment that I must say the parts of this book which I liked best are those to which Mr. Sandler can lay no claim--the letters themselves.
Make no mistake, for a student of history, familiar with the times and circumstances, this collection of letters, consolidated as they are, is a fine resource. As with all letters, they breath life into the names of the past, rounding historical figures into real people, and giving insight into the struggles and emotions of the writers and their times.
This collection, however, is chronologically disjointed, and grouped only loosely by topic. Several times I found myself confirming the dates of letters relative to each other, so that I could accurately track the sequence of events. In the same vein, some letters are abbreviated (an editorial choice of presentation that I accept only grudgingly). More reprehensibly, only half of the Cuban Missile Crisis letters are present, the others loosely alluded to in the contextual notes, but not presented to the reader, a choice that I simply cannot fathom.
So, 2/5 seems about right. The letters make for good reading, if you know the times, but this is neither a complete collection nor an unbiased biography. Your Mileage May Vary.