Hey- I just noticed on Amazon.com that The Hardy Boys: Clues Brothers series books are getting released to E-book format.
Here's the link (http://www.amazon.com/Gross-Ghost-Mystery-Hardy-ebook/dp/B00CCX9CZM/ref=sr_1_10?s=books&ie=UTF8&qid=1366033249&sr=1-10&keywords=Hardy+Boys) for The Gross Ghost Mystery, the first in the series. It's scheduled to be released on August 13, 2013. The next three in the series will release on August 20th.