Help with SAT critical reading?

I took the SAT in October and I got a 640 in critical reading, which was my lowest score in any of the sections. I had the most trouble with page-based questions and vocabulary. I already have some books to help with vocab, but does anyone know of a workbook-type thing that has good practice for the page-based questions? It's fine if it includes vocabulary, but I'd prefer that it doesn't have math or writing questions. Thanks.