| Author | Popularity |
| Ardö, Jonas |
2 |
| Black, Andrew |
2 |
| Blyth, Eleanor |
2 |
| Bonal, Damien |
2 |
| Breder Eller, Cleiton |
2 |
| Buchmann, Nina |
2 |
| Burban, Benoit |
2 |
| Duran Rojas, Maria Carolina |
2 |
| Fuchs, Kathrin |
2 |
| Garrigues, Sebastien |
2 |
| Gedney, Nicola |
2 |
| Harper, Anna B. |
2 |
| Hemming, Debbie |
2 |
| Huntingford, Chris |
2 |
| Mammarella, Ivan |
2 |
| Marthews, Toby |
2 |
| Mathison, Camilla |
2 |
| McGuire, Patrick C. |
2 |
| Merbold, Lutz |
2 |
| Montagnani, Leonardo |
2 |
