Links are to US Amazon store. Deals may not be available in all countries. Deals are available for limited time. Always check price before downloading.
It’s also the last day to get this month’s 100 ebooks for under $3.99.
I don’t know how to link it but the audiobook of The Magicians by Lev Grossman as well as some other ‘big’ books are on sale on iTunes for $6.95.