Naked Powers comics cost around $2.99 US, £1.90 UK, 2.60 Euros or equivalent from the websites listed below
Amazon USA: http://www.amazon.com/Naked-Powers-Origins-ebook/dp/B00ENHZRZY/ref=sr_1_26?ie=UTF8&qid=1376952265&sr=8-26&keywords=dan+mcgill
Amazon UK: http://www.amazon.co.uk/Naked-Powers-Origins-ebook/dp/B00ENHZRZY/ref=sr_1_3?s=digital-text&ie=UTF8&qid=1376951328&sr=1-3&keywords=dan+mcgill#_
Drive Thru Comics: http://comics.drivethrustuff.com/index.php?manufacturers_id=5516
Kobo: http://www.kobobooks.com/ebook/Origins-1/book-tgXW9x6oRU6raTv_lq4N5Q/page1.html?s=VZKWKElTKUW0g1W1Ks4j6A&r=1