I finished reading the book some weeks ago, and I quite liked it.
First a reminder: Novels are fiction. Movies are fiction. TV and movies "based on novels" are double fiction. Things can happen that cannot happen like this in RL.
I did not regret buying the book, I was entertained (of course, there are always parts one likes less, but this is individual taste), and what I liked best was the idea of animals fighting back. Usually when in a book the human race is threatened, it's a virus or a fantasy weapon. Extinction by organized animal armies was novel to me, and that's the main reason I liked the book.
Then I googeled around a bit, and was slightly confused -sorry, haven't bookmarked where- about mainly two things. Patterson was quoted that he thinks the series will be better than the book.(!?!)
Then, from the production came the message that they will be relying more on RL animals than CGI.
Hopefully this was a journalistic misunderstanding, because ever since I read it, I am wondering how many poor animals will be harmed during filming.(Nowadays, I simply assume, if there's an ape in a movie, it's Andy Serkis and his crew!)
All in all, the novel reminded me much of Hitchcock's Birds, and I am going to watch it when it airs in Germany.