The book contains no new storyline information but clarifies previous gray areas. Bennett said many fans may be surprised by some of the clarifications enough to where they would deem them new information. The book is set up as an "in universe" book organized alphabetically and features no behind the scenes information. It does, however, feature many never-before-seen photographs, maps and other items and locations used during the filming process.
According to author Tara Bennett, she and co-author Paul Terry ran all of the book's contents by Lost writer Gregg Nations. When questions remained, said Bennett, they consulted Damon Lindelof and Carlton Cuse themselves. Despite this, the book contains several errors.
In addition to some inconsistencies with what was seen on-screen, numerous copyediting errors appear throughout the body of the book. Beyond having many grammatical and spelling errors, there are several sections of the book where it appears that an early draft of a statement co-exists side by side with the final draft of the same statement.
- Finney的全名為Clark Finney。
- Lizzy的全名為Elizabeth Calloway。
- Ajira航空316航班的副飛行員名字為Peter Ross。