I like "The Enemy" series by Charlie Higson. He has 3 books. The enemy, the dead, and the fear. all about zombies but the virus only effects people 16 and up so its kids vs adult zombies
i personally liked Death Trooper, its set in the Star Wars universe and its got a very interesting take on the zedaplague....
I just finished the As the world dies trilogy by Rhiannon Frater and they were great stories, I really got into the characters. A big favourite of mine is Warm Bodies by Isaac Marion I just love that book.
i did really enjoy the zombie survival guide aswell. however a book by max brooks i think you should look into is world war z. that is my favorite book
World War Z, ZSG was great, I hear Brooks is still coming out with more, recently a comic strip type he wrote depicted actual incidents