The Facts in the Case of M. Valdemar

While not direct, it shares a theme of questioning what constitutes life and humanity when a being's state is profoundly altered or ambiguous.

Both works explore the macabre and philosophical aspects of prolonged existence beyond natural death, challenging the meaning of life and death.

Poe's work established a precedent for scientific intervention altering fundamental human states, which Keyes built upon by exploring the ethical and identity implications of such alterations, focusing on the subjective experience of an altered mind.

Dangerous Visions defined the New Wave SF movement by challenging genre conventions and expanding its thematic scope, thereby creating a fertile ground for later, more explicit explorations of consciousness, identity, and the boundaries of life and death, building on the early boundary-pushing of works like Poe's.

Philip K. Dick's 'half-life' concept in Ubik, where consciousness persists in a suspended state after death, directly echoes Poe's earlier exploration of suspended animation and consciousness at the brink of death.

Poe's early foray into manipulating the boundaries of life and death through scientific means laid groundwork for later explorations of altered states of consciousness and reality, which Dick deeply engaged with.

Cherryh's exploration of creating 'azi' (clones) and their programmed identities builds upon the long-standing speculative tradition, initiated by works like Poe's, of scientifically manipulating the boundaries of life and identity.

Richard K. Morgan's concept of consciousness transfer and digital immortality directly addresses the meaning of death and the manipulation of life's boundaries, a theme pioneered by Edgar Allan Poe's 'The Facts in the Case of M. Valdemar'.

Shares a fascination with the macabre manipulation of life and death, and the uncanny implications of extending or replicating existence.