In the book, "the moonstone," how do the prologue and the epilogue to shape the structure of the novel?

Both the prologue and the opening chapters of the novel call attention to themselves as written documents. The Moonstone has no single narrator, and no omniscient, third-person narration that can reveal everyone's thoughts. Instead, the novel consists of over a dozen individual testimonies written by various characters involved with the diamond or the Verinder family. These characters, in turn, rely on other written documents that are often reproduced within the narrative (though some are not reproduced, as is the case with Penelope's diary). Franklin Blake, nephew  to Lady Verinder, serves as the "editor" of the various testimonies and the force behind the project of taking them all down in writing. Blake suggests "we should all write the story of the Moonstone in turn—as far as our own personal experience extends and no farther." This technique of narration is well suited to the genre of detective fiction, whereby more and more information is gathered through various witnesses, and all cannot be revealed to us at once

explanation:

communication is extremely important in any relationship. importance of communication has been stressed upon time and again. lack of communication creates a number of problems that only increase with time.

it is often seen that the families where people talk to each other frequently are happier. they share their joys, sorrows and other emotions with each other. there is a lively atmosphere in such families. they laugh it out together and celebrate every moment whole-hearted. they never feel lonely or bored. they know whenever they want to talk about something or share an emotion they always have an ear to listen to. such is the importance of communication.

compared to this, the families where all the members are engrossed in their own tasks and do not bother to care about or talk to people around them are usually not as happy. the atmosphere in such families is quite dull and gloomy. people are busy with their own tasks. they have friends outside and are not as close with their family members.

they plan outings with their friends and colleagues rather than their family members. this is because they have neglected the importance of communication all along and are thus not comfortable communicating with each other. and without good communication there is no way one can enjoy.