> There may be pearls in there, but I didn't spot any on quick glance. I've read 1/4 but carefully and already found several pearls. Mind you, some people will

> There may be pearls in there, but I didn't spot any on quick glance. I've read 1/4 but carefully and already found several pearls. Mind you, some people will already know 80% of knowledge in this book, but it's not the same 80% for anyone. I won't tell you what is usable because this book is very general and different parts are usable to different people.