If you think 60 pages is too long, you probably haven't thought about squatting enough.
Starting Strength is 300 pages of actually useful information and analysis of the lifts. If I'm training someone, do they need to read a textbook? Probably not. However, am I going to type out 300 odd pages of advice for some newbie lifter on the internet? Unless I'm getting paid, hell no. But, I can tell them to go read a book someone else has written and then they'll have a much better idea of what to do and why.