I was thinking about using the portfolios he gave at the end of the book as a basis for a investing account I want to open.
Active managers are constantly searching for ideas and strategies that "beat the market," which seems to be the premise of Mr. Dever's book. There are any number of outstanding investors who have indeed found an edge, and some of them write books; Mr. Dever may be one of them. But there also are a huge number of false positives (investors or managers who think they have an edge but don't really). They write books too. It takes time and expertise to separate the wheat from the chaff, and nobody gets it right all of the time.
For these reasons I would advise you to keep reading. If you would like some ideas on other titles, I expect that many advisors on this forum have their own favorites and would be happy to share them with you.
Matthew. First let me say I am glad you are asking investment advisors their opinion prior to just jumping in head first. Full disclosure on this answer, I have not read the book. I only can pose a question to you that may give you the answer you seek. If I were an investor that had the perfect solution to investing, why would I take time away from investing or raising assets to write a book? Typically you see books written by past industry professionals. My advice is read it with a grain of salt. All money managers that are truly incredible at investing, keep investing. Those that aren't write books for money, because they could not continue to outperform. This is my two cents and good luck.