80Cyber
Kobo has 80% off for 24 hrs on Open road Titles the link is to a search on all the Open Road titles and can be refined be genre on the left. The code can be used multiple times :)
Here are some of the Open road authors as per their website they include Octavia E. Butler, Jon Land, Heather Graham, Jack Higgins, Jon Land, Ruth Rendell among many others.
I got the Holland Taylor Trilogy by David Housewright the first novel of which is an Edgar winnnr original price $19.89 with coupon $3.98!
With thanks to the OP at the mobilereads forum
There is also 50% off 119 selected titles with the code 50Cyber and the 40% off code posted last week Bargainmoose40 still works on all non agency titles
Codes can not be stacked
http://www.kobobooks.com/ebook/The-Wisdom-of-the-Koran $2.74 with Code