February Books 5) The Time Capsule, by Peter Anghelides
I noted in September 2009 that this is very enjoyable, marred by some uneven pacing, and I stand by that; I should also note that Anghelides is good at settings, be it a supermarket invaded by aliens or the Natural History Museum.
February Books 6) and 7) The Shadow People, by Scott Handcock; and The White Wolf, by Gary Russell
The two remaining books both had the same basic plot formula - Sarah Jane, Luke, Clyde and Rani go for an adventure in the countryside, in the first case because Sarah gets sucked into a school trip to Wales, in the second because the kids become involved with her journalistic investigations into a Dorset village. But they took the formula in interesting new directions, the shape-shifting aliens who are The Shadow People pushing for a deeper exploration of identity than is usual in this sort of literature, and the remnant spaceship survivors of The White Wolf undergoing a rather tragic process of closure to their story. Both stories also have pleasing continuity chrome, The Shadow People explicitly referring back to the Big Finish Sarah Jane audio Ghost Town and The White Wolf adding substantially to our knowledge of Aunt Lavinia. As with all the Sarah Jane audios, I strongly recommend them, and not just to fans. (No previous knowledge of Aunt Lavinia is required.)
Which takes me to the end of the whole set of ten Sarah Jane audiobooks. There isn't a duff one in the list, frankly; I don't think there is any other range of Who stories which made it into double figures without producing a clunker. I see that on LibraryThing I have given slightly higher marks to The Thirteenth Stone by Justin Richards, to Deadly Download by Jason Arnopp, and to Judgement Day by Scott Gray. (Apart from the three reviewed above, the remainder of the series are The Glittering Storm and The Ghost House by Stephen Cole, Wraith World by Cavan Scott and Children of Steel by Martin Day.) They are all well-written, well-read (all but the last two by Elisabeth Sladen), pleasing to fans and accessible for non-fans. If your routine allows for ebooks of about a CD's length, you could do much, much worse than these.