"High Rise" are inspired by J.G. Ballard's book High-Rise and short story "The Man on the 99th Floor". The lyrics of "PXR5" deal with Hawkwind's transitional period between Astounding Sounds, Amazing Music and Quark, Strangeness and Charm. CD Versions The Virgin CD issue was mastered with tapes different from those used for the original vinyl version. The most notable difference is that "High Rise" is the live version without studio overdubs, so starts with a clunk rather than the portamento bass intro and has a coarser vocal from Calvert. Also "PXR5" gains an introduction that's missing from the original. The Atomhenge CD issue restores the original version of the album, and includes the different versions of "High Rise" and "PXR5" as bonus tracks 14 and 15 respectively. Track listing Side 1 "Death Trap" (Robert Calvert, Dave Brock) – 3:51 "Jack of Shadows" (Calvert, Simon House, Adrian Shaw) – 3:28 "Uncle Sam's on Mars" (Calvert, Brock, House, Simon King) – 5:44 "Infinity" (Calvert, Brock) – 4:17 "Life Form" (Brock) – 1:44 Side 2 "Robot" (Calvert, Brock) – 8:14 "High Rise" (Calvert, House) – 4:36 "PXR5" (Brock) – 5:39 Atomhenge CD bonus tracks "Jack of Shadows" [live studio version] – 3:40 "We Like to Be Frightened" – 2:46 "High Rise" [live studio version] – 4:43 "Robot" [first studio version] – 9:24 "Jack of Shadows" [Adrian Shaw vocal version] – 3:54 "High Rise" [alternate mix] – 4:37 "PXR5" [alternate mix] – 5:40 "Quark, Strangeness and Charm" [live 1978] – 2:38 Personnel From album liner notes Hawkwind Robert Calvert – vocals (1–3, 6, 7) Dave Brock – guitar (except 5), bass (1, 4), synth (1, 3, 4–8), vocals (1, 3, 4–8), backing vocals (2) Simon House – keyboards (2, 3, 6–8) vocals (2, 7), violin (6, 8), synth (8) Adrian Shaw – bass guitar (2, 3, 6–8), backing vocals (2, 3, 8), vocals (6, 7) Simon King – drums (except 5) Credits Tracks 1, 2 and 8: Recorded at Rockfield Studios, January 1978 Track 3: Recorded at Hammersmith Odeon, 5 October 1977 Tracks 4 and 5: Recorded at Week Park Farm, 1978 Tracks 6 and 7: Recorded at Leicester De Montfort Hall, 29 September 1977 Mixed at Rockfield Studios, February 1978. Engineered by Dave Charles and Anton Matthews. Artwork by Phillip Tonkyn. Release history June 1979: Charisma, CDS4016, UK vinyl – first 5000 contained Pete Frame's Hawkwind Family Tree poster. The original cover had