It was pointed out that the Sworn Soldier series all narrated by Avi Roque had Male Narrator on book 1, Non-binary Narrator on book 2 and Female Narrator on book 3. That is not very helpful when a patron has hearing difficulties or preferences for certain vocal ranges and thus excludes MN or FN. I listened to a few samples and the voice sounds male to me. There are around 30 titles done by this narrator. It might be worth reviewing and deciding if all the books should fall under MN or FN. Use Tools - Change headings-query set to add/remove the wanted/unwanted narrator heading.