Surprisingly, Pearson Languages is now selling an updated 4th edition of the “Longman Preparation Course for the TOEFL iBT Test.” This is the first update in 11 years. I did not expect to see an update to this old book out of the blue.
As far as I can tell, the new edition is only available as a 12-month ebook subscription direct from the Pearson site. There is an Amazon listing for a physical paperback, but I don’t believe such a publication actually exists right now.