Jerome Clark · Fourth Edition

The definitive reference on UFO phenomena.

A two-volume guide to the history, people, cases and documents behind more than three decades of UFO research.

The UFO Encyclopedia, Fourth Edition book cover FOURTH EDITION TWO-VOLUME HARDCOVER SET
A landmark reference to the UFO phenomenonSCROLL TO DISCOVER ↓
30+ YEARS Publishing legacy
1,720 Pages
02 Hardcover volumes
4TH Updated edition

REVIEWER'S CHOICE

Unique, comprehensive, meticulously detailed.

Midwest Book Review March 2025

A LANDMARK REFERENCE

A reference built for serious exploration.

For more than three decades, The UFO Encyclopedia has documented the history, people, investigations and controversies surrounding the UFO phenomenon.

The expanded fourth edition brings that research together in a two-volume reference for researchers, libraries, enthusiasts and anyone looking beyond the headlines.

Look inside the encyclopedia
The UFO Encyclopedia Fourth Edition two-volume hardcover set

THE FOURTH EDITION · THE COMPLETE SET

The UFO Encyclopedia,
4th Edition

Explore notable sightings, close encounters, official investigations, historical events and influential figures. This updated two-volume reference brings decades of research together in detailed A–Z entries.

02 Hardcover volumes
1,720 Pages in total
4th Updated edition
$155.00

Shipping and any applicable taxes are calculated at checkout.

THE CONTENTS

Follow the evidence.
Explore the unknown.

From landmark cases to historical records and the people who investigated them, open a reference designed for curious readers and serious researchers alike.
01 / INVESTIGATE

Cases & encounters

Explore reports, eyewitness accounts and the questions that continue to surround them.

02 / UNDERSTAND

People & perspectives

Meet the researchers, witnesses and figures who shaped the history of the subject.

03 / RESEARCH

Documents & history

Trace investigations and archival material through carefully researched A–Z entries.

OPEN THE BOOK

A look
inside.

Sample pages from the fourth edition. Select a page to view it in full size.
Jerome Clark

THE AUTHOR

Jerome Clark

Jerome Clark is a researcher and writer whose books, articles and papers have explored UFO history and unexplained phenomena for decades. He wrote and compiled this edition and the three editions before it.

Written with contributions from Brad Sparks, this fourth edition reflects decades of research and historical context.

THE DETAILS

Frequently asked
questions.

Explore the set ↑
What is included in the set?
The complete fourth edition in two hardcover volumes, containing 1,720 pages in total.
Is this a physical book?
Yes. This listing is for a physical hardcover set, rather than a digital edition.
Is this the latest edition?
Yes. This is the updated fourth edition of The UFO Encyclopedia: The Phenomenon from the Beginning.
How much does shipping cost?
Shipping options and the final cost will be shown during checkout after you enter your delivery address.

THE PHENOMENON FROM THE BEGINNING

A deeper understanding
begins here.

Discover the fourth edition