A collection of the seven titles in the The Chronicles of Narnia, together with a bonus collection of stories,
Boxen, is on sale for $4.99 at Kindle US right now. Not on sale, at least as of now, at Kobo US or Kindle UK.
Here's a link to @rcentros's original post:
https://www.mobileread.com/forums/sh...98#post4147532