Throughout the month, aside from definitions from others, and reviews of novellas I've read (be they "classic" or current), I will also, especially early in the month, point out some recently published novellas that are readily available and look interesting. In a few cases I've already read these and have not gotten around to my review writing.
The great Sunnyoutside Press published Tim Horvath's novella, Circulation, in March 2009. It's priced nice at $10 and still available via their website.
Between blurbs from David Huddle and Alexander Parsons and nice reviews from NewPages.com, and the Review of Contemporary Fiction (among others), not to mention being named the chapbook of the year by Jason Jordan, it's had some really nice things said about it.
What's it about? Here's what the back cover said:
Reading Tim Horvath’s novella Circulation, one imagines what it might be like to go spelunking with Jorge Luis Borges or to shelve books with Scheherazade. In this swirling ode to maps, dreams, and the redemptive power of fiction, the stories proliferate vertiginously. At their emotional core is the quest of the main character, a humble librarian, to understand both his father and himself.
All of that plus the usual great design and physical presence that Sunnyoutside consistently gives their titles? Look for this one at that earlier given link.