Ack!

Just found this on a website:
MGMAT CR and MGMAT SC come without any practice questions. Instead they refer to questions in the Official Guide 12, so you must buy that book to practice and preferably should not have covered it in the past. On the positive note - all Manhattan books come with access to 6 online CAT tests, so you should buy at least one Manhattan GMAT book (any one of them).

Must change my study plan a bit!