Groups Joined by Ulises B.
| Members | Discussions | Books | Last Updated | |
|---|---|---|---|---|
 Libros en español by | 3,037 | 99 | 2,599 | 4 years ago |
 Divulgación científica by | 154 | 7 | 363 | 11 years ago |
 Novela negra y policíaca by | 228 | 23 | 176 | 13 years ago |
 Anagrama by | 35 | 3 | 98 | 14 years ago |