JF Penn Books in Order

Morgan Sierra investigates disturbing deaths in Israel and discovers a conspiracy combining ancient religious curses with modern technology. With ARKANE agent Jake Timber, she searches for the Devil's Bible before a planned release threatens a catastrophic loss of life.

The murder of a nun triggers a hunt for sacred stones guarded for centuries. Psychologist Morgan Sierra joins ARKANE agent Jake Timber when her relatives are taken hostage, racing to recover the relics before their power can be abused.

Ritual killings in Cairo and Washington point toward a conspiracy involving the Ark of the Covenant. Morgan Sierra follows clues through Egypt and Jordan while a dangerous rival pursues the same relic, threatening violence across the Middle East.

Three stories inspired by Dante connect forbidden discoveries across different worlds. An officer investigates an occult murder, twins follow an inherited map into the Arctic, and a sister seeks a missing girl in a postapocalyptic city ruled by sinister powers.

Detective Jamie Brooke investigates a mutilated heiress found among medical specimens while caring for her dying daughter. An antique anatomical figurine brings researcher Blake Daniel into the case, exposing a macabre world where bodily obsession and hidden experiments intersect.

A priest's murder and the theft of a sacred relic ignite nationalist and antisemitic violence in Budapest. Trapped in a synagogue, Morgan Sierra works with a Jewish security adviser to uncover the conspiracy before further bloodshed consumes the city.

Terrorists seize the British Museum to reclaim an ancient staff associated with the Viking apocalypse. Trapped among the hostages, Morgan Sierra joins psychic Blake Daniel to investigate its history and prevent the attackers from unleashing its destructive power.

A psychiatrist's murder in the former Bedlam hospital draws Jamie Brooke into a case rooted in the history of mental illness. Psychic researcher Blake Daniel discovers family connections to a conspiracy whose influence reaches into the British government.

A priest's gruesome murder terrifies Southwark's artists and outsiders, drawing private investigator Jamie Brooke into the hunt. With psychic Blake Daniel's help, she searches for a skin collector as growing violence threatens the people they are trying to protect.

A murder at Barcelona's Sagrada Familia sends Morgan Sierra and Jake Timber searching for a supernatural key. Following clues left by Kabbalist scholars, they must find it before a seeker of dark power uses an approaching planetary alignment to unleash destruction.

A ritual killing in Manhattan marks the start of a crusade for a dark angel's relic. ARKANE agent Jake Timber and linguist Naomi Locasto investigate, while Jake's troubled past complicates their effort to stop the group threatening the city.

A bombing in London accompanies the theft of part of an ancient Hindu sculpture from ARKANE headquarters. Morgan Sierra and Jake Timber pursue its scattered pieces before conspirators assemble a weapon capable of devastating a vast gathering of pilgrims.

An ancient tablet and a sealed underwater sarcophagus point toward the return of a banished evil. Morgan Sierra and Jake Timber race a secret brotherhood to locate seven seals before a lunar eclipse allows a catastrophic resurrection.

Sienna Farren inherits a Bath map shop after her grandfather's murder and discovers her family's connection to a secret agency. New magical abilities draw her into the Mapwalkers' search for a dangerous map beyond the borders of the known world.

A tidal wave separates Ben Henare and Lucy Campion as New Zealand is shaken by earthquakes and volcanic eruptions. Their efforts to reunite bring them against supernatural forces drawn from Māori mythology, threatening both their loved ones and the country.

A concealed tomb and a ritualized death in New Orleans send Jake Timber searching for relics believed capable of raising the dead. Morgan Sierra joins him as a wealthy rival pursues immortality through secrets linked to the Spanish Empire.

A map fragment found in a London plague pit sends Sienna and the Mapwalkers across the Borderlands. They must recover the remaining pieces before the Shadow Cartographers threaten Earthside, while Sienna’s feelings for Finn complicate their dangerous journey.

Natural disasters threaten Earthside as a mutant army rises in the Borderlands. Sienna and the Mapwalkers cross a realm of death after one of their own is taken, seeking the Tower of Winds while struggling to protect both worlds.

A stolen manuscript fragment reveals a route toward the Garden of Eden and a seed with devastating potential. Morgan Sierra and Jake Timber pursue its scattered clues while radical environmentalists seek to restore nature at the expense of humanity.

The disappearance of a priceless relic from Canterbury Cathedral sends Morgan Sierra and Jake Timber across Europe. Their pursuit of hidden sacred objects exposes an ancient conspiracy and a killer whose obsession turns death into a disturbing form of art.

Former military rescuer Walker Kane searches Edinburgh’s hidden depths after his daughter Emily is taken for sacrifice. With help from a librarian and an urban explorer, he must confront the Cabal and the creature awaiting her before time runs out.

Penn recounts walking three ancient pilgrimage routes alone, from Canterbury and Lindisfarne to the Camino from Porto to Santiago. Training, fatigue, uncertainty, faith, and solitude shape her journeys, alongside practical lessons for others considering a pilgrimage of their own.

While digitizing Vatican archives, Martin Klein discovers a letter connected to the secretive Militia Dei. A journey to a Templar crypt in Paris draws him and biblical scholar Camara Mbaye toward an ancient threat concealed beneath the city.

Morgan Sierra and Jake Timber race to find the scattered pieces of a legendary spear. An American general with Nazi ties wants the relic for his political ambitions, drawing them into a dangerous pursuit from Vienna to Tibet.

After a scandal costs architect Rebecca Langford her job, she finds work at a Somerset vineyard linked to her missing sister. Seasonal rituals and disappearing workers reveal a disturbing connection between belonging, blood, and the wine the estate produces.

Eight guests arrive at a luxurious desert retreat carrying secrets they hope to escape. A sandstorm cuts them off, and a deadly fire turns their stay into a struggle for survival, where mistrust and betrayal become as dangerous as the landscape.

Archaeologist Eve Calder steals a strange skeleton from a South Pacific shrine for a secretive collector. Aboard a tourist sailing ship, she faces attacks and drownings as something from the sea pursues the bones and demands their return.

Ancient remains, hidden experiments, and submerged secrets disturb the boundary between ordinary life and the supernatural. These dark stories follow archaeologists, artists, and other seekers into places where history, science, and ambition awaken forces that should have remained buried.