how is never let me go a good title for the novel

The title of Never Let Me Go has multiple layers of meaning. On the most superficial level, it refers to the (fictional) song that reminds Kathy of her childhood. However, the title also refers to Madame's perception that the young clones have been left to cling to the "old, humane world." The novel's title, then, is also a call to action––never to forsake our empathy and humanity the way society has forsaken Kathy.