In this follow-up to the #1 bestselling thriller Invisible, every perfect murder looks like an accident, but as bodies start to pile up across the country, two FBI agents realize that something horrible is happening. FBI agent Emmy Dockery is absolutely relentless. She's young and driven, and her unique skill at seeing connections others miss has brought her an impressive string of arrests. But a shocking new case -- unfolding across the country -- has left her utterly baffled. The victims all appear to have died by accident, and have seemingly nothing in common. But this many deaths can't be coincidence. And the killer is somehow one step ahead of every move Dockery makes. How? To FBI special agent Harrison "Books" Bookman, everyone in the FBI is a suspect -- particularly Emmy Dockery (the fact that she's his ex-fiancee doesn't make it easier). But someone else is watching Dockery. Studying, learning, waiting. Until it's the perfect time to strike.

"In 1953, a man was found dead from cyanide poisoning near the Philadelphia airport with a picture of a Nazi aircraft in his wallet. Taped to his abdomen was an enciphered message. In 1912, a book dealer named Wilfrid Voynich came into possession of an illuminated cipher manuscript once belonging to Emperor Rudolf II, who was obsessed with alchemy and the occult. Wartime codebreakers tried--and failed--to unlock the book's secrets, and it remains an enigma to this day. In this lively and entertaining book, Craig Bauer examines these and other vexing ciphers yet to be cracked. Some may reveal the identity of a spy or serial killer, provide the location of buried treasure, or expose a secret society--while others may be elaborate hoaxes. Unsolved! begins by explaining the basics of cryptology, and then explores the history behind an array of unsolved ciphers. It looks at ancient ciphers, ciphers created by artists and composers, ciphers left by killers and victims, Cold War ciphers, and many others. Some are infamous, like the ciphers in the Zodiac letters, while others were created purely as intellectual challenges by figures such as Nobel Prize-winning physicist Richard P. Feynman. Bauer lays out the evidence surrounding each cipher, describes the efforts of geniuses and eccentrics--in some cases both--to decipher it, and invites readers to try their hand at puzzles that have stymied so many others. Unsolved! takes readers from the ancient world to the digital age, providing an amazing tour of many of history's greatest unsolved ciphers"--

Second edition sold 2241 copies in N.A. and 1600 ROW. New edition contains 50 percent new material.

Read the #1 New York Times bestselling thriller Invisible, then continue the series with Unsolved. Everyone thinks Emmy Dockery is crazy. Obsessed with finding the link between hundreds of unsolved cases, Emmy has taken leave from her job as an FBI researcher. Now all she has are the newspaper clippings that wallpaper her bedroom, and her recurring nightmares of an all-consuming fire. Not even Emmy's ex-boyfriend, field agent Harrison "Books" Bookman, will believe her that hundreds of kidnappings, rapes, and murders are all connected. That is, until Emmy finds a piece of evidence he can't afford to ignore. More murders are reported by the day--and they're all inexplicable. No motives, no murder weapons, no suspects. Could one person really be responsible for these unthinkable crimes? INVISIBLE is James Patterson's scariest, most chilling thriller yet.

Based off one of the most popular web series on the internet, Ryan Bergara and Shane Madej present BuzzFeed Unsolved Supernatural, 101 of the scariest, spookiest, and creepiest locations around the USA and a few abroad, with 50 percent brand-new content and locales exclusive to the book. Hey there, demons! BuzzFeed Unsolved Supernatural has entertained viewers over the course of seven spooky seasons, covering the supernatural and otherworldly spirits, to ghosts, ghouls, unexplained paranormal activity, and everything in between. In their thrilling debut book, cohosts Shane Madej and Ryan Bergara (lovingly known as the “ghoul boys” to fans) deep-dive into dozens of haunted locations around the USA and a few abroad, including subjects from some of their most favorite and talked about episodes, as well as brand-new locations not previously seen before on their show. As they explore the history behind haunted houses, creepy graveyards, former insane asylums, abandoned buildings, and horrifying hotels, Shane and Ryan use their trademark wit and humor to dissect each terrifying tale with their most hilarious highlights and biting commentary. So hold on to your hell-bound soul, boys and ghouls—it’s about to get demonic up in here.

Mathematicians and non-mathematicians alike have long been fascinated by geometrical problems, particularly those that are intuitive in the sense of being easy to state, perhaps with the aid of a simple diagram. Each section in the book describes a problem or a group of related problems. Usually the problems are capable of generalization of variation in many directions. The book can be appreciated at many levels and is intended for everyone from amateurs to research mathematicians.

Provides an opportunity to study some of the world's most interesting unsolved mysteries.