| 0 | Christmas Book | cover | 1 | pencils: Maurice Whitman; inks: Maurice Whitman | Atom the Cat First, Atomic Mouse, Atomic Rabbit First, Li'l Genius, Li'l Tomboy, Cimota Mouse, Ollie Orwell, Santa Claus |
| 1 | - | comic story | 1 | | Li'l Genius, Li'l Tomboy, Ollie Orwell |
| 2 | The Night Before Christmas | comic story | 9 | script: Clement C. Moore | Atomic Mouse, Count Gatto, Cimota Mouse, Santa Claus |
| 3 | Playing It Safe | comic story | 2 | | Atom the Cat First, Tom Cat |
| 4 | It Was the Day Before Christmas... | comic story | 9 | | Li'l Tomboy |
| 5 | Milton Mouse's Discovery | text story | 2 | letters: typeset | Milton Mouse; Morton; Midge; Maxwell Mouse; Margaret Mouse; Maurice Mousez; Von Mousenstein; Hans Muenster |
| 6 | How Do You Explain That? | comic story | 1 | | Li'l Mouse |
| 7 | A Special Present | comic story | 4 | | Timmy |
| 8 | Find the Strength for Your Life... | public service announcement | 1 | letters: typeset | |
| 9 | Me and My Badge | comic story | 3 | | Atomic Rabbit First |
| 10 | Gus the Goofy Ghost | comic story | 1 | | Gus |
| 11 | - | comic story | 7 | pencils: Al Fago; inks: Al Fago | Atomic Mouse, Count Gatto, Cimota Mouse, Shadow |
| 12 | - | comic story | 5 | pencils: Al Fago; inks: Al Fago | Atomic Mouse, Count Gatto, Cimota Mouse, Professor Invento, Shadow |
| 13 | What's in a Name? | text story | 2 | letters: typeset | Regie Skunk; Mrs. Skunk; Richie Rabbit; Buster Bear |
| 14 | A Dragon Has Many Lives! | comic story | 6 | pencils: Al Fago; inks: Al Fago | Atomic Mouse, Count Gatto, Cimota Mouse |
| 15 | Circus Capers | comic story | 7 | | Happy First |
| 16 | Winter Sports | comic story | 4 | editing: Kay Woods | Willie the Worm; Sammy Skunk |
| 18 | A Late Christmas | comic story | 5 | | Atomic Rabbit First, Santa Claus |
| 19 | The Giftnappers | comic story | 8 | | Atom the Cat First, Santa Claus, Tom Cat |
| 20 | Seal Psychology | text story | 2 | letters: typeset | William Martin; Herbert Gintler; Fred Lorman; John Simpson; Squirro the Squirrel; Cecil the Platypus; Sobo the Seal; Penelope Platypus |
| 21 | Li'l Ghost | comic story | 1 | | Timmy |
| 22 | The Trap | comic story | 6 | | Atom the Cat First, Tom Cat |
| 23 | A Lot of Good | comic story | 2 | | Timmy |
| 24 | - | promo (ad from the publisher) | 1 | letters: typeset | Atomic Mouse, Cimota Mouse |
| 25 | The Longest List Ever | comic story | 7 | | Atomic Rabbit First |
| 26 | Bearing Gifts | comic story | 1 | | Atomic Mouse, Atomic Rabbit First, Cimota Mouse, Santa Claus |
| 27 | Santa Gets Going | comic story | 1 | pencils: Maurice Whitman; inks: Maurice Whitman | Atomic Mouse, Atomic Rabbit First, Cimota Mouse, Santa Claus |