Torchwood books

Hi!

I was looking for some help really! My friend wants some of the Torchwood books for her birthday and she's a big Ianto fan. So, basically, I was wondering if anyone here had any recommendations. I've read some of the reviews and "The Twilight Streets" seems to be the best bet, but are there any others that anyone thinks are good?

I should mention she's not a big Gwen fan and she doesn't like Jack/Gwen much, but apart from that she's not very picky. She just loves Ianto!

Any help would be appreciated. Thanks!