Your three official TOEFL books have had their release dates adjusted (and harmonized). All three now have release dates of January 12, per Amazon. Cover images are available now too. However, Amazon might not be the most reliable source of this information, of course. Does anyone from ETS want to confirm that January 12 is the actual release date?
Curiously, the listed page count for each is longer than the current editions. That’s weird, since the test is shorter than before and the number of included tests remains the same as before.
Meanwhile, Princeton Review has a book scheduled for February. Barron’s has a book scheduled for April.