Books aren't always just there to entertain, some of them are there to offer guidance, to shape your world view and help you better understand the world around you.
In your twenties, you probably need this more than ever.
You've already read Pride and Prejudice three times, you exhausted Shakespeare while at school, and if anyone mentions Of Mice and Men to you again you are probably going to cry.
Quora users have listed their opinions on the most important books to read before you turn 30, take a look below.
Grapes of Wrath, John Steinbeck
What they said on Quora: "I do not know any other book with such elegant prose and more poignant painting of the picture."
On the Road, Jack Kerouac
"If you love to travel. If you are crazy enough. If you do booze, smoke or drugs and even if you don't, let me present you this hell of a book.
This book is only for people who are driven by their passion, craziness and the zeal to live life."
Diary of a Young Girl, Anne Frank
"This book will tell you about the pain, sufferings, love, dreams, hatred and excitement of a young Jewish girl who stayed for two years in hiding and then later was killed in a concentration camp."
The Kite Runner, Khaled Hosseinni
"Khaled Hosseini will astonish you with his power of storytelling. I can bet you that once you start reading this book you can't keep it down. I guess nobody until now has been able to describe Afghanistan in a better way than Hosseini."
Most iconic book covers
Most iconic book covers
1/12 The Great Gatsby - F Scott Fitzgerald
Francis Cugat designed the cover art for Fitzgerald's quintessential jazz age novel. He finished it before the book was complete and the author liked it so much he 'wrote it into' the novel.
2/12 The Godfather - Mario Puzo
This 1969 cover art was produced by S Neil Fujita and became so iconic that the gothic typeface and puppeteer's hand were used as imagery in the film too.
3/12 The Cat in the Hat - Dr Seuss
Theodor Seuss Geisel designed this cartoon for his own 1957 children's classic.
4/12 Fifty Shades of Grey - EL James
If this cover to EL James' first erotic novel isn't one of the most iconic sleeves of recent times, we don't know what is.
5/12 The Catcher in the Rye - JD Salinger
Salinger was known for being fussy when it came to his book designs. He liked them simple with the only words being his name and the title, like this one by E Michael Mitchell.
6/12 'Porno' - Irvine Welsh
DJ Design came up with this crass cover for Irvine Welsh's Trainspotting sequel that few book-buyers could walk by without noticing.
7/12 Catch 22 - Joseph Heller
American jazz musician and designer Paul Bacon created this simple yet striking cover for Heller's novel. He is also the man behind the One Flew Over the Cuckoo's Nest and Slaughterhouse-Five sleeves.
8/12 One Day - David Nicholls
Craig Ward designed this bright romantic sleeve for David Nicholls' 2009 novel.
9/12 A Clockwork Orange - Anthony Burgess
David Pelham came up with this famous cover ten years after A Clockwork Orange was first published in 1962.
10/12 In Cold Blood - Truman Capote
S Neil Fujita designed this crime thriller's sleeve using a classic typeface, a strong black border and a simple drop of blood. The drop was brighter at first but Capote asked for it to be made darker as time had elapsed since the murders.
11/12 Grapes of Wrath - John Steinbeck
Illustrator Elmer Hader painted this by Steinbeck's request for his 1939 novel. He then created the cover art for East of Eden and The Winter of Our Discontent, too.
12/12 Invisible Man - Ralph Ellison
Edward McKnight Kauffer's powerful artwork represents the protagonist who is struggling to assert his identity in a world of hate.
The Time Traveller's Wife, Audrey Niffenegger
"I usually have a bias against love stories, but this is one romantic novel I just adored."
The Last Mughal, William Dalrymple
"If Indian history interests you even a single bit, you should read it. It gives you many insights and information on the India around and in the battle of 1857."
The Little Prince, Antoine de Saint-Exupéry
"Probably a book that should be read for the first time when you are still a kid, but once it sinks in it becomes, allow me to quote higher powers in writing, the 'cornerstone of your understanding of the universe.'"
The Last Lecture, Randy Pausch & Jeffrey Zaslow
"Because this last lecture will stay with you forever."
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