Just an fyi: if you live on a budget like I do and don't have access to the reference books that NCARB lists as study material through an office or friends, you can rent most of the books on Amazon for 1/2 to 1/3 of the price of the books. There may be other sites that rent books, but it was a happy surprise for me when I started shopping for them. Some books you may want to buy to keep for your future office, but it would be cost prohibitive for me to buy every book on the list. I rented them last week and the due-back date is in May, which should hopefully be enough time for a take and one re-take if I happen to fail (hopefully not but it helps to plan for these things).
There may be other resources that are free or low cost that have been discussed elsewhere, but I haven't seen this option.
Good Luck to all!