Brook Where Small Fish Swim

Brook Where Small Fish Swim (Brook) is a brown tabby she-cat with gray eyes, younger sister to Talon of Swooping Eagle, a prey-hunter, and a member of the Tribe of Rushing Water. Brook is from a younger litter than her brother, and when their mother was killed by Sharptooth, Brook was looked after by Talon.

Moonrise
She befriended Stormfur in Moonrise and later they both fell in love. However, when Brook was forced to betray him, he didn't forgive her until Sharptooth was killed later in the book.

Dawn
In Dawn, Stormfur chose to leave RiverClan and join her Tribe.

Starlight
Coming Soon

Twilight
She appears in the final scene of Twilight with Stormfur in ThunderClan's camp at the conclusion of the badger battle. The reason they have come is unknown, though they claim it to be that they wanted to see if the Clans were settling in.

Sunset
In Sunset, Brook and Stormfur stay with ThunderClan for a short time, only to leave for RiverClan. They intend to stay with Stormfur's former Clan and Brook plans to become a warrior. Brambleclaw, on a voyage around the lake appointed by Firestar, sees Brook accidentally chase a squirrel across the border to ShadowClan. Hawkfrost spots Brook and the three cats go back to RiverClan's camp. After a number of RiverClan cats claim that Brook shouldn't be in RiverClan because she can't follow The Warrior Code nor does she know it. Hawkfrost tells Leopardstar that he would have liked for Brook to be run over by a monster that barely missed her. A moment later, Hawkfrost goads Stormfur into attacking him. Blackclaw and Mistyfoot pull the warriors apart, and Leopardstar reluctantly exiles Stormfur and Brook from RiverClan, saying that he has forgotten, just doesn't care for, or doesn't believe in the warrior code. They leave RiverClan, and the two are then taken back to ThunderClan by Brambleclaw. Firestar accepts their return, though he meets some disagreement from a few cats.

The Sight
In The Sight, Jaypaw said Brook's scent smelled like the mountain wind and the falling waterfalls, and that her voice is slightly deep, and her accent is thick.