Reprinted from Doctor Who Magazine #88-#107, Voyager contains the adventures of the Sixth Doctor and his alien companion Frobisher, a shape-changing alien Whifferdill who prefers to look like a penguin, all illustrated by John Ridgway who gets a two-page interview at the start. The first half of the book has stories by Steve Parkhouse, which are visionary and surreal and take the Doctor to strange places in inner and outer space, swirling around the sinister magician Astralabus, but including of all things a Rupert Bear pastiche. The second half, by Alan McKenzie, is a little (though not much) closer to the TV series, even bringing in Peri for the last story, but is still rather better than the TV show was at the time. Ridgway's art is superb as well. It is well established that I am not a Sixth Doctor fan but I recommend this volume.
I can't be as enthusiastic, I'm afraid, about Blackout, a new audiobook by Oli Smith, read by Stuart Milligan (who played President Nixon in this season's opening two-parter). It is a rather undemanding alien invasion romp which doesn't make enough of its 1965 New York setting. Despite valiant efforts, Milligan does not quite succeed in capturing the accents and characterisations of Smith, Gillan and Darville; more seriously, he is white and the main viewpoint character is explicitly African-American. There's an intriguing continuity reference to the Doctor's knowledge of his impending death, but otherwise this really suffers from appearing in the middle of a run of TV episodes which are much better.
I couldn't really recommend any of these to non-Who fans. For Whovians, Voyager turned out to be rather a gem.