The latest Time Trip e-book is set during the period the Tenth Doctor is travelling alone, definitely after the special "Planet of the Dead" and I would speculate before "The Waters of Mars". In the story the TARDIS is damaged by a leftover weapon from the Time War and the Doctor finds himself in a Welsh town called Jonestown where a version of Christina De Souza appears to live. And there's a storm coming.
The Tenth Doctor is characterised well here, although because we follow his thoughts for a while at a time it is exhausting to read. It's fine when we get a fast speech from the Doctor but pages and pages of his thoughts are just too much. I'm not happy with the lack of a proper companion here. Christina 2.0 is not really much like the original Christina and even she was it would have been an odd choice. If you are going to write a Tenth Doctor story surely it would be best to have Rose, Martha or Donna in it. The story mentions Jones in the title yet there is no sign of Martha whatsoever.
There isn't much of story here and when the mystery is solved I can't help feeling a bit flat. It was just a rubbish explanation.
If I was a teacher marking this I would write "Good try Nick but I think we need to do some more practice at this".