You could try Richard Brown's Advanced Math book. It has a solutions manual. Make sure you get the 2002 book and the correct manual for it (I've linked to the correct versions).

You could also try Art of Problem Solving. They make solutions manuals.

I've used the Brown book for my own reviewing and with my DS. I find the explanations to be lucid. We haven't tried AoPS yet, but own the Intermediate Algebra books and will be starting them in a couple of weeks.