Paper (new and used) and electronic versions are available, including the following (all prices are as of this writing and do not include tax where it is charged):

• From the bookstore: $109.50 new and $82.25 used.
• From Amazon: $110.03 new, $49.50 Kindle e-book, rent from $27.45, various prices used. Also $74.62 for a “Loose Leaf” edition.
• From Barnes and Noble: $111.31 new, $49.50 Nook e-book.
• From the publisher's website: $115.95 new, $52.00 Wiley E-Text.