pam·phlet 
(pămflĭt)
(pămflĭt)n.
1. An unbound printed work, usually with a paper cover.
2. A short essay or treatise, usually on a current topic, published without a binding.
[Middle English pamflet, from Medieval Latin pamfletus, from Pamphiletus, diminutive of Pamphilus, amatory Latin poem of the 1100s, from Greek pamphilos, beloved by all : pan-, pan- + philos, beloved.]
pamphlet·ar′y (pămflĭ-tĕr′ē) adj.