Yesterday's topic is Emerald Covers because Emerald is May's birthstone. So not just green covers... Emerald.
The Dog Who Knew Too Much by Spencer Quinn - This might be pushing it, but I felt like at least some of that green was emerald.
I'd Rather Be Reading by a bunch of authors - Some of those books surely count.
A Girl Like That by Tanaz Bhathena - The reflection in her glasses.
Rich People Problems by Kevin Kwan - This one has the most emerald on the cover so far.
Emerald Green by Kiersten Gier - And the most obvious choice.
There you go. 5 books with Emerald Green on the covers. This turned out to be harder than I thought. Green isn't a very popular color for book covers, and Emerald in particular!