HELP!!! - Book title/author.

[Scooterlad69]

I'm trying to remember the name of a horror book I read in the late 70's early 80's about a person who apparently drowned in a swimming pool, seeing a white light at the end of a tunnel etc.. then is brought back to life. Thereafter the person is hounded by zombie like people who have been sent to retrieve the person. A sort of gruesome " A matter of life or death"!!! - it's driving me crazy, please help me get some some kip tonight!!!!

[sunopaleface]

It's Death Walkers by Gary Brandner (also wrote The Howling)