By far, we have discussed a lot about writing a book, looking for an idea, setting the sub plots, building characters and growing them through the book, and now we come to the next extremely very important part of a book, the end, aka, the climax of a book.
After a reader goes through all the ups and down of the book, they always look towards the end of the book. Be it a romance, a horror, a suspense thriller or book related to any theme, the climax is the most powerful part of a book. A good story but a weak climax can dull the complete book but a good story and an amazing climax can make the reader come looking for more. There are many readers who read the same book more than once because they liked the book so much.
Climax is often more important than the whole book because of the curiosity. Will the lovers reunite or will they be seperated forever? Who's the serial killer? Who's the ghost that haunts the house? So on and so forth. All the build up created by the writer in the entire book comes all down to what lies in the final. All the questions that goes in the mind of the readers, the end of the book answers. It's the climax that makes a book worth it or not for majority readers. The climax of a book is generally written in the last 5 to 10 chapters of a book, and around 40-60 pages long and not more than that else it will become too stretched and boring.
A climax should be unique-
A climax should be something that can not be very easily guessed by the readers of a book. For example, imagine that you have been reading a murder mystery novel, what kind of a book would you like, a book where you can predict the murderer right from the starting or a book where you're taken by surprise when the name and identity of the killer is revealed? The latter I guess? That's what most of the readers will choose. A predictable climax isn't much liked and can make your book an average.
A Climax should be logical-
The ending of a book should logically sit well with the overall narrative of the book. For example, you simply cannot make the protagonist find an abrutive new answer from thin air in the last pages, instead show the protagonist finding that the answer lied scattered all through in the book and there were many clues given and the answer is found out after placing all these clues together logically.
A Climax should be fast paced-
After a fast begining, a slow middle part, the climax again have to gain a momentum and be fast paced. The readers often starts feeling bored while going through the middle chapters of the book. The curiosity sets very strongly in their minds, plus, after a slow paced book, when the story starts getting a rhythm, it again gains the deep interest of the reader leaving a huge impact, when too many things are happening all at once, the reader is forced to turn page after page in quick succession.
So now, you have got an idea as a writer about why the climax is important in a book and you can build up a strong climax to entertain your readers like a true amazing and creative author that you're.