Not every book contains a prologue, but at one point in time, my curiosity got the best of me, and I needed to know if prologues are necessary. After reading up on the subject, and this is strictly my opinion, I would say no. I believe it depends on the preference of the author on rather or not it would be a good fit.
For those that do not know, a prologue, sometimes referred to as a preface, is an introduction at the beginning of a novel. This form of introduction is an excellent way to give readers the general idea of your story while at the same time piquing their interest. The bonus being that a reader can get a quick feel of your style of writing.
From firsthand experience, it’s not always easy to write a prologue that is suitable for your story. I included one in my novel Eternal Existence that fits in nicely, where I did not with Trial of Marriage.
Nonetheless, if deciding to go in that direction, there is a good explanatory article called How to Write a Prologue that states some useful tips to follow. Overall, you want your prologue: to be interesting, be sure the length is appropriate, keep the language/tone consistent within the prologue, and limit the background information. If you follow these straightforward rules you cannot go wrong.
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