What is the actual difficulty of the TOEFL®?

[Konstantin]

I compared the assignments in several books and the difficulties of them are completely different. What is the actual difficulty? Do Reading and Listening look like at toefl.org or they are harder?
Please share you experience

[Tabby]

Hi Konstantin,
I guess the difficulty level of the test is higher than you find at toefl.org especially in reading and listening sections.
Writing and speaking were more or less of the same level that you find in most of the books/CDs.
You can find questions of similar difficulty level in Kaplan book/CD.
I hope I was able to answer your question.
Thanks,
Tabby