hei the books section is on the left not right!
And for books
Have you covered these
SQL server internals By kalen
SQL server MVP deep dives
SQL server administration by wrox publishers (any version)
There is a book on sql server(administration) by ken henderson (forgot name)
If you had then you become to somewhat intermediate, but to advance it you should put it this into practice on appropriate time and place to resolve or triage a situation. To attain that means to advance the level it will take time and experience. And sorry I don't know any advanced books
Note: I have not read them all. Currently reading kalen's book.