I have read this one years ago and it is a great book by a very successful guy in the space! You should read it for sure, and as you said it has been awhile since it was written so pricing has changed a lot. I would look at this venture as some type of vocation (I.e. plumbing, electrician, framer). You can read a book and multiple books, but unless you are out there doing it (I.e. getting bids and getting contractors to truly get you an exact estimate) you will be far off from the numbers you want and may even lose money on the flip/rehab.
The best advice I would suggest in my experience is that you should get into the line of work by either partnering with someone or working with someone on some projects prior to going into a flip on your own. I have an example, there is a client that I work with and he had never flipped before. He left his job last year and my team found him a property to flip. We worked him through the process, brought him a contractor, and gave him all the resources along with giving him tips on layout and all. He had a successful flip, and sold it for a profit within seven days on the market. Now he has one under his belt he can go out and use that framework to do the next one and the next.
The real life experience is the best option for learning and gaining the knowledge you need.