*DC: In Justice League of America #21 & #22, the ground-breaking ‘Crisis On Earth-One’ and ‘Crisis On Earth-Two’, the heroes of the Justice League met their parallel-world counterparts, the Justice Society of America, for the first time, and an annual tradition was formed. Superbly created by Gardner Fox, Mike Sekowsky and Bernard Sachs, the multiple heroes and villains of these stories were expertly juggled, with everyone getting their moment to shine. Reader response was such that a year later, in issues #29 and #30, we were brought the two-part, ‘Crisis On Earth-Three’ and ‘The Most Dangerous Earth of All!’ respectively, which introduced the Justice League’s evil counterparts, the Crime Syndicate of America, from yet another parallel world. After a period in limbo, the CSA were revived in later decades, and have become major antagonists in subsequent DC Universes. The Justice Society went from strength to strength, and have starred in several ongoing series since. #29 and #30 featured in this update.
PICTURED: JUSTICE LEAGUE OF AMERICA BOTH SOLD
#29 VG p £80 JSA crossover; 1st Crime Syndicate. Nice glossy copy with some handling wear and minor spine and edge wear. Small colour-breaking crease across bottom right cover corner. Staples are firm at spine with lower off at centrefold. Just above the bottom staple there are two tiny staple holes where an unnecessary staple has been removed. Very nice white to off-white pages. 
#30 VG/FN p £40 JSA crossover. Glossy copy with minor edge and handling wear. Staples firm and tight at spine and centrefold. Very nice white to off-white pages.