That is exactly what I was feeling. Anyway I DO HAVE a number of LDAP books....
There's also a lot of wrong information around. And at last, most information is - as said before - product oriented.
Excuse me anyway for making publicity, ( I avoided to mention the title )
I would consult amazon to have some idea of what's around, you will find a number of books about this argument.
best
reinhard voglmaier