For the Justice League, this format is particularly vital. League stories are often grand in scale, featuring massive rosters and complex, multi-part storylines. Reading a allows the reader to experience the full scope of a writer’s vision without the interruption of month-long breaks or the clutter of advertisements. It transforms a serialized adventure into an epic novel.
If you are looking to start from scratch, these TPBs are widely recommended for their accessibility: Green Lantern