Apress has a daily ebook deal where they discount a single ebook for 24
hours to $10. Recently they’ve been a bunch of older books, today’s is
actually relevant and quite new:
Practical Rails Plugins (http://rubyurl.com/6iHZ)
I’m not associated with Apress, just passing along the information.
don’t have RSS for daily deals so I whipped up a twitterbot with ruby a
while ago, follow it here: http://twitter.com/apressdailydeal