Old favorite/New Favorite: Books?

So this is an interesting one...

Old favorite: Books for reading

Source

New favorite: Books for planters

These particular books can be purchased as a kit from this website but I'm sure it would be a super cool DIY.

Supplies:
-Old book (please use one that is not a first edition or rare book...pretty please, I hate when I see amazing books turned into art projects).
-X-acto knife
-soil
-flower
-Some sort of plastic planter that could be used to line the inside of the book.
-Glue-ish substance, maybe mod podge to hold all the book pages together.

If you make one please comment with the link, I'd love to see it.