| Issue | #366 |
| Published | August 1967 |
| Frequency | monthly |
| Cover Price | 0.12 USD |
| Pages | 36 |
| Editing | Julius Schwartz |
| Characters | Batman [Bruce Wayne] |
| Synopsis | Batman is writing a last will and testament. |
| Genre | Superhero |
| Pencils | Carmine Infantino (signed) |
| Inks | Murphy Anderson (signed) |
| Notes | Credits for pencils and inks confirmed from Julius Schwartz's editorial records, provided by DC Comics (October 2007). |
| Reprinted | in Showcase Presents Batman (DC, 2006 series) #3 |
| Synopsis | Ad for toy. |
| Letters | typeset |
| Notes | inside front cover |
| Synopsis | Ad for mechanical savings bank. |
| Letters | typeset |
| Notes | inside front cover |
| Characters | Batman [Bruce Wayne]; Robin [Dick Grayson]; Alfred Pennyworth; Doc Hastings; John Kobler; Fred Tinney; Commissioner Jim Gordon |
| Synopsis | Someone has sent hypnotic letters to several people, including Bruce Wayne, and booby trapped some of their possessions so they will end up killing each other. |
| Genre | Superhero |
| Script | Gardner Fox |
| Pencils | Carmine Infantino |
| Inks | Sid Greene |
| Notes | Story continues in Detective Comics #367. Credits for script, pencils and inks confirmed from Julius Schwartz's editorial records, provided by DC Comics. |
| Reprinted | in Batman (DC, 1940 series) #262 (April 1975); in Showcase Presents Batman (DC, 2006 series) #3 |
| Characters | Lone Ranger; Silver; Tonto; Taka |
| Synopsis | Ad for plastic models. |
| Letters | typeset |
| Notes | Between pages 4-5 of Batman story. |
| Synopsis | Ad for toy from unnamed company in Rockville Centre, NY. |
| Notes | Between pages 10-11 of Batman story. |
| Synopsis | Ad for toy from unnamed company in Rockville Centre, NY. |
| Letters | typeset |
| Notes | Between pages 10-11 of Batman story. |
| Characters | Aquaman; Atom |
| Synopsis | House ad for next issue of The Brave And The Bold. |
| Synopsis | Letters from Frank Klein, Peter Sanderson, Neil Telafor, and Randy Cleveland, with responses. |
| Script | Julius Schwartz ? |
| Letters | typeset |
| Characters | Elongated Man [Ralph Dibny]; Sue Dibny; Mr. Booth; thieves |
| Synopsis | Sue gets suspicious of Mr. Booth and has Ralph follow him to a crime scene. Mr. Booth turns out to be a bystander but Ralph captures some thieves anyway. |
| Genre | Superhero |
| Script | John Broome |
| Pencils | Carmine Infantino |
| Inks | Sid Greene |
| Notes | Credits for script, pencils and inks confirmed from Julius Schwartz's editorial records, provided by DC Comics. |
| Reprinted | in Showcase Presents The Elongated Man (DC, 2006 series) #1 |
| Synopsis | Ad for sales club. |
| Letters | typeset |
| Notes | Between pages 3-4 of Elongated Man story. |
| Characters | Bomba |
| Synopsis | House ad for next issue of Bomba. |
| Characters | Jimmy Olsen; Superman |
| Synopsis | House ad for Jimmy Olsen 80pg. Giant #104. |
| Characters | Superman |
| Synopsis | Ad for amusement park in New Jersey featuring a Batman slide. |
| Characters | Cap |
| Synopsis | Tip on how to keep from losing small model pieces on your workbench. |
| Script | Henry Boltinoff (signed); Tom Hatcher (idea) |
| Pencils | Henry Boltinoff (signed) |
| Inks | Henry Boltinoff (signed) |
| Letters | Henry Boltinoff (signed) |
| Notes | Readers whose suggestions are published will receive $5 and the original art. |
| Synopsis | House ad for upcoming DC comics, with covers of Action Comics #353 and Tomahawk #112 shown. |
| Letters | typeset |
| Synopsis | Ad for plastic army toy. |
| Letters | typeset |
| Characters | Ben Rebhuhn; John Sill; Felipe Mendazo |
| Synopsis | Ad for body building books. |
| Pencils | ? (photo) |
| Inks | ? (photo) |
| Letters | typeset |
| Synopsis | Ad for Christmas card sales. |
| Pencils | ? (photo) |
| Inks | ? (photo) |
| Letters | typeset |
| Notes | inside back cover |
| Synopsis | Ad for toy gun with realistic sound. |
| Letters | typeset |
| Notes | back cover |