Open Road Media has re-released these six Matthew Corbett novels in ebook formats with new cover art by Ian Koviak. The books are available worldwide starting today. (The Queen of Bedlam (book #2) is also available in ebook formats from S&S.)
Links to purchase Robert McCammon ebooks
 Speaks the Nightbird (2002) Matthew Corbett #1 Kindle | NOOK | Kobo iTunes | Google Amazon UK | Amazon CA | Amazon AU |
 Mister Slaughter (2010) Matthew Corbett #3 Kindle | NOOK | Kobo iTunes | Google Kobo CA | Amazon CA Amazon UK | Amazon AU |
 The Providence Rider (2012) Matthew Corbett #4 Kindle | NOOK | Kobo iTunes | Google Kobo CA | Amazon CA Amazon UK | Amazon AU |
 The River of Souls (2014) Matthew Corbett #5 Kindle | NOOK | Kobo iTunes | Google Amazon CA | Kobo CA Amazon UK | Amazon AU | |
 Freedom of the Mask (2016) Matthew Corbett #6 Kindle | NOOK | Kobo iTunes | Google Kobo CA | Amazon CA Amazon UK | Amazon AU |
 Cardinal Black (2019) Matthew Corbett #7 Kindle | NOOK | Kobo iTunes | Google Amazon CA | Kobo CA Kindle UK |