Black Hole Collectables

"A journey that begins where everything ends!"
The other day while searching though some local thrift shops I found two great Walt Disney "the Black Hole" items. The first is the Walt Disney Productions' "the Black Hole" coloring book from Whitman, and dated 1979. Amazingly, this coloring book is in mint condition and completely uncolored, which is not something you see very often from coloring books you find at thrift shops! I'm not sure what the original price of this item was, but I paid a whopping 25 cents.
The second item is the 1979 novel written by Alan Dean Foster, from Del Rey Books, with a cover price of $1.95. This one cost me 50 cents.
Strange that I found both items at the same shop. I wonder if they both came from the same home, perhaps belonging originally to another "the Black Hole" fan.