If you buy a paperback copy of one of the Mike Scott adventure novels through Amazon, you will get a Kindle copy of the same book for free. If you give the print books as gifts, no one has to know you kept the ebooks for yourself.
If you want to save the trees and send ebook gifts, the first four novels in the series also have a new, lower price. You can get each of the Kindle versions of the books for $2.99. (Heart of the Maya is still $3.99).