Hey! Look like The Hardy Boys: Secret Files will be getting a boxed set release on August 5, 2014. It will contain the first five titles: Trouble at the Arcade, The Missing Mitt, Mystery Map, Hopping Mad and A Monster of a Mystery. Cool! :) 8)
http://www.amazon.com/Hardy-Boys-Secret-Files-Collection/dp/1481414739/ref=sr_1_2?s=books&ie=UTF8&qid=1381871591&sr=1-2&keywords=%22Hardy+Boys%22
Just saw that the cover art is now posted for this on Amazon as well. :)