Best book mistakes of all time
Continuity mistake: In Chapter 19, Wade describes the small efficiency apartment he has moved into, which used to be an average hotel room. He says at one point that the room "was basically a cube, about ten meters long on each side." A ten-meter cube is actually a really big room - that's over 32 feet on each side, including ceiling height. Then, just to confirm that this is indeed a mistake, later in the same chapter he refers to "my tiny one-room apartment."
Factual error: In the book Teabing is a die hard British patriot, yet he refers to the sport of soccer. NO Englishman would use the word soccer for the game of football. [People keep trying to correct this - you've really got to accept it. It's nothing to do with Teabing being older - soccer may have been used in the very early days of the game, but the governing body of the sport in the UK is the Football Association, formed in 1863, demonstrating how that was the accepted word for the sport even then (otherwise it would be the Soccer Association). Likewise the international governing body, FIFA (Fédération Internationale de Football Association), formed in 1904 - no mention of the word soccer there either. And it won't be him changing it for Langdon's benefit, considering a) Langdon's intelligent enough to know what he means, and b) he's so determinedly English about everything else. This site is run by a Brit, and it's not getting changed. :-)]
Continuity mistake: Dumbledore tells Harry at the end that Lord Voldemort is the last remaining ancestor of Salazar Slytherin. But ancestors are in the past - he means Voldemort is the last descendant of Salazar Slytherin. Not a mistake Dumbledore would have made. (Corrected in later printings.)
Factual error: In Chapter 5, Koontz explains how Grandma Rowena started smacking her lips while eating, at the age of 75. He then says this same event happened "halfway between her seventh and eighth decades". But at 75, she is actually halfway between her eighth and ninth decades (or, if you prefer, halfway through her eighth decade) - much like the 1700s are the 18th century, not the 17th.
Factual error: In chapter 21 Vittoria states that "everything has an opposite. Protons have electrons." Protons and electrons are NOT opposites. The opposite of a proton is an antiproton, the opposite of an electron an antielectron (or positron). Other than having opposite charges, a proton is completely different from an electron, ie. a proton is a hadron made from 3 quarks, Up Up Down, making it a baryon. An electron is a first generation lepton and is a fundamental particle. As a physicist, Vittoria wouldn't make this mistake.
Factual error: Roland comes from the mountains in the east, arrives at the Great Western Sea, and then decides to travel north (Chapter 1, section 3). This means that as he heads north, the eastern mountains should be on his right and the western sea should be on his left. But as he walks, the sea is on his right and the mountains are on his left (Chapter 1, section 4).
Plot hole: When Julius is going after Pompey to Asia Minor and he reaches the harbor in Greece he tries to talk to the sailors but they don't speak Latin. So he asks Adán to translate for him, but he is unable to since he hasn't learned Greek yet. But Julius is fluent in Greek himself, he was taught as a boy and uses the language on several occasions throughout the series, including in this book. Why couldn't he just talk to the sailors in Greek himself?
Continuity mistake: In the chapter entitled Smooth Criminal, Reed is asked by the Billing's Girls to steal a physics test and that she has 15 minutes to do it. Early in the chapter she states that after glancing at her watch she had already wasted 4 minutes but at the end of the chapter she states that she wished she'd had time to put on a watch as she had no idea how much time was elapsing.
Continuity mistake: When Aladdin is battling Jafar, he is shown holding a sword. On the first page of this, the part of the hand guard on the sword that is on the sharp side of the sword is curled up and the back side is curled down. But the next page with the sword shows this reversed.
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Factual error: Petra is reading some details about the size of a murder weapon used to commit 6 similar murders. The diameter of the weapon is estimated at 77 centimeters. It says according to Petra's ruler, 77 centimeters is 3 inches. This should be 77 millimeters as 77 centimeters is about 30 inches.
Factual error: During the part of the book where Elspeth Lucas is leaving the Vanguard Motel, she is driving a Corvette. Theo Packman, a spy, has been forced to hide in the trunk of her car because the police have arrived at the motel searching for him. When Elspeth is leaving, the police question her, and shine a flashlight into her car, searching for Theo in the front and back seats. Problem is, Corvettes have never had back seats. They have been a two-seater sports car since they began production in 1953.
Factual error: The author reveals her limited Spanish when she has a character, purportedly a native Spanish speaker, saying to Ingrid, "¿Cuál es su nombre? Su hija es más guapa." Which translates to, "Which is her name? Your daughter is more beautiful." But in the book, those words are rendered as, "What is her name? Your daughter is very pretty." Not only does the author a) mistranslate the Spanish, but she b) gives the woman words no native speaker of Spanish would say.
Factual error: In Chapter 7, Andrea's boyfriend Alex sends her an e-mail to tell her that his six-year-old student has slashed a classmate on the arm and that he will have to miss their planned dinner in order to deal with the situation. Andrea thinks about how bad she feels for Alex and his fourth grade student. Fourth graders are 9 or 10 years old, not 6.
Continuity mistake: This is seen over two books: Artemis Fowl and Artemis Fowl: The Eternity Code. In Artemis Fowl, Chapter 2, Artemis cracked his knuckles when he was trying to decode the fairy Book. However, in Artemis Fowl: The Eternity Code, Chapter 1, Jon Spiro cracked his knuckles, and it is stated that Artemis detests that habit.