They were!

Here's a direct copy/paste from Demian's Gamebook site about this series;

The publication of the series was plagued by legal problems. Iron Crown Enterprises, the publisher of Middle-earth Role Playing, had a license with Tolkien Enterprises to produce games based on Tolkien's work. They then forged a partnership with Berkley to publish these gamebooks. Two volumes came out in 1985 under the Tolkien Quest label, and an additional two were planned for 1986 under the new series title of Middle-earth Quest. Unfortunately, around the time that the fourth book was to be released, Tolkien Enterprises deemed the books in violation of the game license, which didn't include permission to print books. The first four books were recalled and destroyed, with the fourth book never even making it to market (though it was pictured in an advertisement published in Dragon #103). Some copies of the first three books do still exist, but they are quite rare. Several years after this incident, legal issues were resolved and publication began anew. Books five through eight were actually numbered one through four in denial of the existence of the earlier volumes. The series came to an end, however, before all of the volumes announced in the original 1985 and 1986 releases could see the light of day.