I read quite a lot of books like that so it's hard to pick one favourite. The best one I've read recently is The Last Policeman (you can read my review on Weekend Notes here http://www.weekendnotes.co by Ben H. Winters m/the-last-policeman-book-review/ ).
Other favourites include The Day of The Triffids and The Kraken Wakes by John Wyndham. There are loads of zombie novels, of which my current favourite is The Reapers are the Angels by Alden Bell, closely followed by Zone One by Colson Whitehead and Feed by Mira Grant (http://www.weekendnotes.com/feed-book-review/ )
I thought The Road was beautifully written, though a touch too bleak for my taste (yes, even for the genre).