I finished this title last night, and must say I really enjoyed it. It has been 18 months since I last read a new zombie novel, but I'm glad I picked this one up. It has a very dynamic story line. I liked the beginning that quickly throws you into the action with an interesting and diverse set of characters. The Irish setting, with the shadow of 'The Troubles' and the IRA, etc was inspired. The ending sets up the possibilty of a sequel - which would be no bad thing. I think I'd buy it!
If I had any criticise for the book it's that it possibly missed the opportunity to open up the story on a wider canvas. It keeps to quite a small set of characters, in a limited number of locations. I found it interesting when the story touched upon the military involvement, and I think there was scope to spend some time showing how the government and military all over Ireland were coping with the outbreak. Also, two sets of unrelated characters ending up at the same flat in the finale seemed a tad contrived. I wasn't mad on the idea of the little girl's significance either - Too 28 weeks Later. On a final personal note, everyone being a fine shot with a Glock 17 erked me a little, with a slight lack of realism that (a) it's really hard to hit moving 'head' target with a handgun with any accuracy and (b) the characters weren't deaf from all that shooting!
Small gripes aside, this is one of the better zombie novels I've read and I would recommend it. Clearly Simmons is an emerging talent, and has a bright horror writing future.