This book, to put it bluntly, is gayer than Christmas. I found this delightful, of course, but lesser fans (of the not so horrible fangirl variety as myself) might find themselves dizzy after being repeatedly bludgeoned by James Goss' not so secret gay agenda. (Protip: When the terrible alien plot involves marching in the Pride Parade, you do need to stop and ask yourself just how very much your suspension of disbelief can stretch. Mine, where Torchwood is involved, stretches to encompass the whole South Canada Sea, so I laughed, shrugged, and carried on.)
All in all, this book is an excellent read. It's on par with The Twilight Streets, from the fantastic Gary Russell, in terms of characterization and plot. James Goss uses internet networking sites - Facebook, namely - as plot device and brings the ever-popular fandom's 'Five Times' fanfiction to life in print. It's obvious from the way the book reads that James Goss is a fan of Torchwood, which makes the book all the better, written by a fan for the fans.
One supposes that a review also has to touch on the fact that Ianto Jones spends the entirety of the book, save for a chapter-long flashback scene, with (as the character puts it) "a surprising lack of cock." Goss uses this plot device - the old science fiction stand-by of a supposed body swap, taking a male character out of his element by changing his sex - with expert grace. From Ianto's perspective, one can really imagine what it's like for a man who spontaneously wakes up as a woman, complete with hormonal changes and the scary prospect of being stuck. The author explores this strange situation in typical Torchwood fashion, without lingering on the strange and unusual, but also giving the character an edge of humanity as he deals with it.
That said, I'd definitely recommend this book to fellow Torchwood fans. It's an accurate representation of the characters as portrayed on television, a wonderful companion novel, and great read. James Goss shines brilliant and does the show great justice. :)