The Official Guide to the New TOEFL IBT (2007)

I used this book for TOEFL preparation, and in my opinion it's almost all you will need to prepare your own test too.
It is written by the same Organization that manages the TOEFL test, therefore the exercises are really close to the real ones.
The enclosed CD is useful because it will show on your PC the real test interface and procedure. It can be listened on CD Players too, although it will not run on older devices.
A couple of cons:
-The CD contains just 1 sample test, therefore exercising cannot be too much extensive
-It is a bit old (probably 2005 or 2004) so it doesn't use all the potentials of latest technology. For example in writing essays and speech exercises the suggestion is to try and write or talk without any feedback from TOEFL. Maybe enclosing the password to get 1 free scoring for a sample test from TOEFL real scorers, would be much more effective.
-It falls very short on grammar. Having dropped my English grammar books more than ten years ago, I wanted go through "oxford grammar" again, and to do so I had to borrow an old school-book.

The 'Little River' is a dealer you can trust in my opinion. I got just what they described in their advert, and I am happy with their after sales' attention.