Monomaniac

Monomaniac (noun): excessive concentration on a single thought or idea to the point of mental illness

"This happens with certain monomaniacs when they concentrate too long on one thing..." (Dostoevsky, 28)



In the mornings, I turn into a bit of a monomaniac- obsessed with the search for hot coffee.

Dostoevsky, Fyodor. Crime and Punishment. Trans. Richard Pevear and Larissa Volokhonsky. New York: Alfred A. Knopf, 1993. Print.