Let me preface this by saying that I own a tutoring company in the Bay Area called Unleashed Learning. We've just developed our own guide for the SSAT/ISEE based in part on what's missing in others. The Arco guide is definitely one of the better ones out there. It covers all the relevant info, and gives some great tips. However, it sometimes hides some very important strategies in the margins, or gives tips that can unnecessarily waste time. It also doesn't give practice tests for all levels of the ISEE, as there are 3 levels, but only 2 tests in the book. In all, a good buy if you're short on time :)