I'm in the process of vectorising this. Except for the one on the bottom left, I'll just retrace the book, not the plant.
This is a commission, kind of... people tend to give me chocolate. Despite the usual Creative Commons license, these are all of the finished sketches for a logo of a blog about environmental libraries. As you can see, there was a favourite design and the one on the bottom right is the one they're going with. And if there's one thing I like to get paid for, it's drawing books.