Action Comics (1938 DC) UK Edition comic books 1971

UK edition. Identical to US edition, but has 6p cover price. Cover by Neal Adams. "This Hostage Must Die!", script by Leo Dorfman, pencils by Curt Swan, inks by Murphy Anderson; Superman discovers that the red jewel is drawing energy from a red sun, and frees himself by blocking out its light; Then he discovers that Frank Haldane has found the treasure of Montezuma, and is attempting to steal it with a mechanical mole of his own design. "Feud of the Titans!", script by Leo Dorfman (as Geoff Browne), pencils by Curt Swan, inks by Murphy Anderson; Superman and Supergirl are made hostile to each other and goaded into a super-feud when fumes from a brainwash bomb they are disposing of in the Fortress of Solitude's disintegration pit combine with Kryptonian elements there and make them hate each other. 36 pgs., full color.