The greatest strength and weakness of this book is that it is typical Ian Livingstone. There is nothing really new or original but it contains all those elements that Ian Livingstone does so well that it doesn't spoil it's enjoyment.
It is another adventure where the objective is to infiltrate the lair of an evil magic user and prevent his schemes by assassination. To succeed in this confrontation there is the usual need to collect certain items of equipment and information. For those familiar with Ian Livingstone's work this follows a pattern you can virtually predict. This makes the adventure a little easier than perhaps it should be.
This is an author playing to his strengths however. As such, many familiar elements from previous adventures are re-introduced. There are flirtations with revisiting Darkwood Forest and Stonebridge and the return of Yaztromo, now a stalwart of the FF world. There are friendly dwarves and huntsmen to gain as allies who are reminiscent of the companions to be met in other adventures, such as Deathtrap Dungeon and Caverns of the Snow Witch.
There is also a variety of imaginative and dangerous monsters, even though this does feel a bit like a journey through a list of monsters at times rather than being fully relevant to the story. The Gargantis sequence does virtually feel like a copy of the Pit Fiend battle from Deathtrap Dungeon. Razaak, although not as well developed as a character as Zagor or Balthous Dire, is still a well constructed villain, vaguely reminiscent of Emporer Palpatine.
This is not Ian Livingstone's strongest adventure but it contains all the right elements and atmosphere to engross the reader. If this is the first FF book you have read by this author you will probably find it quite challenging. If you have read many other adventures of his you will know what to expect. This won't spoil your enjoyment however.