Atlas of Unidentified Flying Objects: and Unidentified Anomalous Phenomena is an illustrated reference book by Andy McGrillen, the British creator and host of That UFO Podcast. Ivy Press, part of the Quarto Group, published the 224-page hardback in September 2025 in its Unexpected Atlases series, and a paperback is listed for March 2027. The subtitle is sometimes given as "and Unexplained Anomalous Phenomena," including on the podcast's own book page, but the publisher's title uses "Unidentified."

The atlas arranges 34 cases into five chapters, on crash retrievals, abductions, military encounters, civilian sightings and close encounters, each case told through a specially commissioned map, a case study, photographs and witness testimony. Its crash-retrieval chapter runs from Roswell and the 1953 Kingman account to Kecksburg, Varginha in Brazil and Coyame in Mexico. Military cases include the Tic Tac encounters off San Diego, the Rendlesham Forest incident, Shag Harbour, the Belgian wave and Tehran, and the later chapters reach Trans-en-Provence in France, Dalnegorsk and Voronezh in Russia, Ruwa in Zimbabwe, Dechmont Woods in Scotland, Socorro in New Mexico and Kofu in Japan. Ivy Press pitches it to readers who are "a believer or a skeptic."

The atlas presents itself as a survey of reported cases rather than an argument for one explanation, built from the case literature and the testimony of witnesses and investigators. Promotion for an April 2026 appearance on The Good Trouble Show said several chapters draw on McGrillen's own podcast interviews. Retail listings carry praise from the researcher Richard Dolan, who wrote that McGrillen "has created something special," and from the Midwest Book Review, which called it "a seminal and exhaustive study."

McGrillen promoted the atlas throughout 2026, discussing it in May on the Doomer Friday livestream alongside cases such as Kingman, Voronezh, Dalnegorsk and the 1978 disappearance of Frederick Valentich over the Bass Strait, and posting regular discounts on the hardback. For a podcaster whose show reached more than 1,000 episodes, the book turned years of interviews into a single reference that sets well-known American cases beside lesser-known ones from Africa, Asia, Europe and South America.