Yellowfang's Secret

As a warrior apprentice, Yellowpaw (later Yellowfang), the titular character, becomes close with Raggedpelt, a warrior whose father is unknown and suspected to have been a housecat (kittypet), leading some in ShadowClan to shun him, as housecats are considered to live a "soft" life. Yellowpaw helps Raggedpelt uncover the truth, and they discover that Raggedpelt was indeed fathered by a housecat named Hal. Hal rejects Raggedpelt, leading Raggedpelt to reject him as a father and kill him.

From a young age, Yellowfang physically experiences others' pain as her own. Sagewhisker, the ShadowClan medicine cat, convinces Yellowfang that this ability would make her effective as a medicine cat if she could learn to control the power. Sagewhisker thus takes Yellowfang on as an apprentice, and Yellowfang takes the medicine cats' vows, including the forsaking of taking a mate. Despite this, she and Raggedpelt continue their relationship in secret and Yellowfang ultimately becomes pregnant. Yellowfang gives birth in secret, but only one kit, Brokenkit, survives. Raggedpelt has Brokenkit cared for by another she-cat in the Clan, withholding the mother's identity. Brokenkit grows up spoiled: his parents, who are in positions of power, indulge him and refuse to punish him, and he develops into a vicious cat without learning empathy and other virtuous character traits as a result. Eventually, Brokenkit becomes the warrior Brokentail, and later, becomes ShadowClan's deputy. Brokentail trains his apprentices with extreme methods, which go unchecked as his father refuses to see the wrong in his son's actions. When he finally reprimands Brokentail, Brokentail appears to acquiesce but secretly plots his father's murder to gain control of the Clan, while blaming the death on neighbouring WindClan.

Having taken over ShadowClan, Brokenstar institutes a vicious regime, bullying his way to eventual near-totalitarian power. Using his father's death as an excuse, he launches many attacks on the neighbouring Clans, many of which Yellowfang considers unnecessary. Brokenstar, however, rejects all criticism, continuing the attacks and eventually implementing extreme tactics to sustain his war efforts: he begins training kits before they are six months old (the age laid down in the warrior code as when apprenticeship may begin), and asks the Clan's elders, who cannot contribute to the fighting forces, to leave camp in order to save resources. When a kit dies in battle, Yellowfang finally speaks out, leading Brokenstar to secretly set up another ploy to falsely accuse Yellowfang of the deaths of two kits, allowing him to exile her from the Clan.

Exiled, Yellowfang enters neighbouring ThunderClan's territory, where she is apprehended and taken prisoner by Firepaw (a scene initially depicted in Into the Wild from Firepaw's perspective).

Barnes and Noble described the series as continuing "in high style".[2]

Yellowfang's Secret was published by HarperCollins in hardcover and e-book format on 9 October 2012.[1][3] The paperback edition was published on 8 April 2014.[4] The novel has also been translated into German and Finnish.[5][6] Yellowfang's Secret has also been translated into Chinese and French. The Russian translation was released in two volumes.