It is if one changes the breaks in the lines:
The hero died at (five syllables)
the front line of the novel (seven syllables)
I wanted to write. (five syllables)
5-7-5. Proper haiku. And quite amusing, and the summary of my career as a would-be writer.
SimonBB, I also refer you to the long-past
Great Klingon Haiku and Limerick Contest. There was never enough interest to justify another competitive round, but don’t let that stop you from showing off your compositional accomplishments. (Just remember the translation requirements as posted on the Rules and Regs page.)
(Addendum: Looks like ter'eS was busy posting his thoughts in two languages while I was busy editing mine in one. It never ceases to amaze me how some people can post on the wing.... My points still stand, though.)