The two Official TOEFL iBT Tests books contain the most accurate practice tests available. Each book has five tests, and I recommend that students get both of them. Just working through each test is guaranteed to increase your score at least somewhat, and it will certainly give you a deeper understanding of how the TOEFL is constructed. The accuracy of these practice tests is what makes them so valuable – most third party books and websites have terrible sample questions. Some major publishers publish tests that are mind-bogglingly terrible.
I should mention at this point the current editions of these two books (Volume one has hit the 4th edition and Volume two has hit the third edition) are very similar to the previous editions. One reading passage has been changed in volume 1, but otherwise the tests have the same questions. They are, of course, modified to match the changes to the test introduced in 2019 so there are fewer reading, listening and speaking questions. The good news is that the omitted questions include all of the non-standard reading question types that plagued earlier editions.
The only real difference between the two books is how the speaking and writing answers are presented. In Volume 1, the book talks about what an answer should contain, while in Volume 2 actual sample answers are provided. Both methods are helpful. The explanations function sort of like a template, laying out exactly what information should be included and not included. The samples, of course, are more tangible. I do wish that each book included both. Oh well.
The digital content is no longer provided on a DVD. Instead, students must use a code to access the files on McGraw-Hill’s website. I like that the content can be accessed online, but sadly the code can only be used two times. Make sure to back up those files!
My bottom line is that these are the best TOEFL books available. They are the only ones that I wholeheartedly recommend.