The original design and formatting of this edition were overseen by Jack Lynch, with consultancy provided by Sam Choi. The keying and markup were created by a team of assistants, including Rebecca Carroll, Yoonmee Chang, Carlos Decena, Max Greenhut, Matthew Hart, Adam Machado, Christopher Marcisz, Alexander Orlovsky, Kallan Resnick, Suzanna Roth, Mark Shanaman, Erik Simpson, Christian Stadler, and Shawn Walker. The University of Pennsylvania provided key support for space and equipment.

All texts are transcribed from reliable standard editions. In the case of translated works, every effort has been made to select an edition known to, or contemporary with, Mary Shelley.

The following silent emendations have been introduced throughout: