The Hardy Boys - 1969 was released on:
USA: 6 September 1969
The Hardy Boys The Mystery of the Applegate Treasure - 1956 Dig for Treasure 1-6 was released on: USA: 9 October 1956
The Hardy Boys Nancy Drew Mysteries - 1977 Mystery of the Solid Gold Kicker 1-14 was released on: USA: 22 May 1977 UK: 24 March 1979
The Hardy Boys Nancy Drew Mysteries - 1977 A Haunting We Will Go 1-8 was released on: USA: 3 April 1977
The Pretty Boys - 2011 was released on: USA: 1 June 2012
Boys Toys - 2011 was released on: USA: 15 October 2011
The Hardy Boys - 2012 was released on: USA: 27 April 2012 (limited)
The Hardy Boys - 1995 Jazzman 1-2 was released on: USA: 30 September 1995
The Hardy Boys - 1995 No Dice 1-13 was released on: USA: 16 December 1995
The Hardy Boys - 1995 Say Cheese - 1.4 was released on: USA: 14 October 1995
The Hardy Boys - 1995 R-I-P- 1-9 was released on: USA: 18 November 1995
The Hardy Boys - 1995 Play Ball 1-10 was released on: USA: 25 November 1995
The Hardy Boys - 1995 A Perfect Stranger 1-3 was released on: USA: 7 October 1995
The Hardy Boys - 1995 Say Cheese 1-4 was released on: USA: 14 October 1995
The Hardy Boys - 1995 Love Birds 1-11 was released on: USA: 2 December 1995
The Hardy Boys The Mystery of the Applegate Treasure - 1956 Boys in Trouble 1-8 was released on: USA: 11 October 1956
"The Hardy Boys: The Mystery of the Ghost Farm" was first published in 1957. The exact release date may vary depending on the edition or printing, but it was originally released in 1957.
The Hardy Boys Nancy Drew Mysteries - 1977 was released on: USA: 30 January 1977 Belgium: 20 September 1978