The first 100 pages discusses the methodology of modern historiography and demonstrates how biblical critics continue to use out of date methodologies in their attempt to destroy the concept that ancient Israel actually existed. Especially telling is his discussion on testimony. They maintain that the biblical testimony about Israel's history is as valid a source as any other. Even modern archeaology is not neutral but needs to be interpreted; therefore it becomes another testimony in the mix.
The next two hundred pages discuss the history of Israel with this positive-testimony model. They do not paint as comprehensive a history as some might like (along the lines of Bright). Instead they focus on the problem areas rasied by the text.
This is a terrific book and it is taking a very important place in my library.