Depends on what you want. S&J is probably the best if you're interested in a complete approach with underlying derivations. If you're just interested in explanation of how to apply the Spec., then some of the simpler books, such as Segui, McCormac, etc. might be quicker.
As a side note, I'm hoping that someone will step up and write a GOOD advanced steel textbook soon, to replace the current SJ&M which is almost entirely a quick modification of previous editions with equations updated. They're lacking coverage of key topics and have outdated focus.
Anybody have a suggestion for a similar, but updated book? One with lots of derivations, references to underlying research, etc.