John, i felt like you for years: while i watched every zombie movie i could lay my hands on throughout my life, i never even considered reading a zombie novel. Despite the likes of Romero and Fulci delivering smart, bizarro scares, it must have never occurred to me that they could be at all interesting in print.
Then, by accident, i bought Twilight of the Dead, by Travis Adkins (Permuted Press). I thought it was some sort of crappy, self-published effort that id give up on after thirty pages, but for a quid i'd give it a go. Instead, i fell in love with zombie books. World War Z followed, and i didnt so much as read, as live, that book. Ive not stopped since.
The Zombie Apocalypse is a setting, not a genre, not a sub-genre, in exactly the same way as 'the old west' is. There are a million stories you can tell within that setting, and our Mr HOO HAA did the setting proud.
Therevare a couple of books you MUST get, based upon my knowledge of your particular interests: the Day By Day Armaggedon duet (dbda and dbda: beyond exile by j a bourne, published by pocket books). Both are available through your local bookshop, or online, and both will knock your socks off.
Start a zombie shelf, like mine! But keep FLU in pride of place, cos it's fab.
SBT