To Boldly Go: Rare Photos from the TOS Soundstage
Debuting on 10 March 2016, To Boldly Go: Rare Photos from the TOS Soundstage is a three-volume reference book series that that acts as a companion set to Marc Cushman's These Are the Voyages: TOS series.

Volumes
To Boldly Go: Rare Photos from the TOS Soundstage - Season One
To Boldly Go: Rare Photos from the TOS Soundstage - Season Two
To Boldly Go: Rare Photos from the TOS Soundstage - Season Three

Reference books