I just heard back from Collins that the new TOEFL books they published in June are not fully updated to match the current version of the test. They still reflect the old 3.5 hour version of the test. That’s unfortunate, as the Collins TOEFL books are generally really good. It is also unfortunate for Collins that their publishing schedule couldn’t be delayed somehow to allow for revisions.
I might still buy one or two of the books as I’m always interested to see what the big publishers are up to.
If you want to go shopping for them on Amazon, you can start here. Collins is usually pretty accurate when it comes to practice questions, so I’m sure they are still a valuable study resource.