I have just finished reviewing a new book entitled "The Haunted Ukulele." 59 ghoulishly delightful songs with chords, strumming patterns, and in some cases tabs. They range in difficulty from easy to moderately challenging. I can't imagine finding half these songs on my own, and some are originals. The tutorials on the author's website are clear and easy to follow. It's available in hard and e-copies. Reviews on Amazon are all 5 stars. Interested in spooky songs? Check it out.
http://ukuleleplay.com/haunted/
http://ukuleleplay.com/haunted/