Mary Shelley's Frankenstein has been published numerous times. The first edition in 1818 was then republished in 1823. A revised edition was then published in 1831. It has been in print ever since it was first published, with additional editions published in a variety of formats.
In the original edition of the book there were 23 chapters. This version was released in three different languages. However, now the 1831 edition is considered the main one. The most apparent change is the development of the first chapter. The introduction is made larger and split in two, making the book 24 chapters long.
In the updated version, Shelley explained why she wrote the book and split the first part. It has more chapters than the original one. In such a way, the readers could understand the author’s intent better. The three volumes explained Walton’s, Frankenstein’s, and the monster’s points of view.