This book gives me the chills everytime I read it. It has also been made into an excellent, even creepier animated film, the mood of the story being greatly enhanced by the soundtrack.

Throughout the book Jim Bloggs, the husband, answers his wife's doubts about the efficacy of their precautions with the line "Ours is not to reason why, dear. ... Now what was the next line?" He is quoting the Charge of the Light Brigade (a poem about soldiers sent to their deaths by incompetent commanders) by Alfred Lord Tennyson. The full quote, which he never does remember before he dies, goes:

"Forward, the Light Brigade!"
Was there a man dismay'd?
Not tho' the soldier knew
Someone had blunder'd:
Their's not to make reply,
Their's not to reason why,
Their's but to do and die:

Into the valley of Death
Rode the six hundred.

The book is even creepier if you've read the other comics that Jim and Hilda Bloggs appear in, like Gentleman Jim, which is just a sweet little comic with nice illustrations about how Jim is frustrated with his job and imagines all the other things he could have done with his life.