From the back of the book Shell Shock:

Simon Forward was born in Penzance in 1967.  He dabbled in computer programming, but from the age of eleven he wanted to be a writer 'when he grew up'.  He is now a published author, with two Doctor Who novels, Drift (2002) and emotional Chemistry (2003) for BBC Books, a number of Doctor Who short stories for the BBC and Big Finish, as well as an audio drama, The Sandman, for Big Finish - and no doubt an expanding waistline - under his belt.  He lives to write, as opposed to writing to live, developing other SF novels and stories, as well as some works of contemporary fiction, in the constant hope of being able to do both.  Oh, and he's still waiting to grow up.

From the back of the book Crooked World:

Steve Lyons was born and lives in Salford, near Manchester.  He has contributed articles, interviews, short stories and comic strips to many magazines, including Doctor Who Magazine, Starburst, SFX and Dreamwatch.  He has also written X-Men novels, Doctor Who audio plays and books about several TV series, including Doctor Who: The Completely Useless Encyclopedia.  He can hardly believe he's typing this, but Crooked World is his tenth Doctor Who novel!  His favourite cartoon is Scooby-Doo - but then, if you've read this far, you already knew that.

From the back of the book Time Zero

Justin Richards has no cat.  He might (or might not) have had a cat when he was a child, but if he did he never ever put it in a box.  He does have two children, but that's not the same thing at all.  Believe me, if you have a cat and you're thinking of trading up for kids, there is a big difference.

When he isn't busy with his children, Justin acts as Creative Consultant to BBC Worldwide's various Doctor Who book ranges as well as doing some writing of his own - novels, audios, television, non fiction and other 'stuff'.  Presumably this is done during the time he would have had to spend with the cat, so given that Justin never has enough time for writing, he's thinking of not getting another one.

From the back of the book Frayed:

Tara Samms was born in 1971 and has watched far too much television all her life.  A woman of mystery, she enjoys sitting both behind and in front of the artist's easel and is the vexed owner of an insomniac hound dog: he slept once.