| Issue | #90 |
| Published | January 1966 |
| Frequency | Monthly except for February, May and November |
| Cover Price | 0.12 USD |
| Pages | 36 |
| Editing | Mort Weisinger |
| Characters | Jimmy Olsen; Big Jimmy |
| Genre | superhero |
| Pencils | Curt Swan |
| Inks | George Klein |
| Synopsis | A group of kids discover the library. |
| Script | Jack Schiff |
| Pencils | Bernard Baily |
| Inks | Bernard Baily |
| Letters | Ira Schnapp |
| Notes | inside front cover |
| Characters | Jimmy Olsen; Big Jimmy; Silk Benson; Ratsy Moggs; Nik-Wik (alien from planet Borog); Lucy Lane |
| Synopsis | An alien android looks like Jimmy Olsen only is large and strong and two crooks plan to use him to kill Superman. |
| Genre | superhero |
| Script | Jerry Siegel |
| Pencils | Curt Swan |
| Inks | George Klein |
| Letters | Milton Snapinn |
| Letters | Typeset |
| Characters | Jimmy Olsen; Mr. Mxyzptlk (really Jimmy Olsen in disguise); "Kayo" Kane; Dutch; Superman [Clark Kent] |
| Synopsis | Jimmy poses as Mxyzptlk to bring "Kayo" Kane to justice without the help of Superman. |
| Genre | superhero |
| Script | Otto Binder |
| Pencils | George Papp |
| Inks | George Papp |
| Letters | Milton Snapinn |
| Characters | Super Turtle |
| Synopsis | Super Turtle helps the police stop two criminals. |
| Genre | Humor; Funny Animal |
| Script | Henry Boltinoff |
| Pencils | Henry Boltinoff |
| Inks | Henry Boltinoff |
| Letters | Henry Boltinoff |