Item - Invisible Rival

Like the last book, this one makes use of the same characters as the first adventure but puts a different person into the main spotlight. There's slightly more explicit continuity, though, for this turns out to be another espionage mission. In fact, it ends up being a rather odd tale involving advanced technology and strange mutants, and it almost feels like an exceptionally wordy Be an Interplanetary Spy book. I'm not sure what the title has to do with anything, though; in fact, the same thing could be said of the previous book, unless I'm missing something obvious. In any case, I didn't find the book to be terribly entertaining. In fact, I was more relieved than anything else when it finally ended; perhaps it wasn't a good idea to try to review three of these things in one sitting!

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