Are Book Series Titles Italicized?
MLA’s guidance makes this a classification question rather than a blanket italics rule: identify whether the series wording is itself a formal work title.
Not automatically. In MLA guidance, whether a book-series or trilogy name is italicized depends on whether it functions as the formal title of a work rather than merely an informal series designation.
Key details
Important caveats
Scope Boundary
The cited MLA Style Center article was written for the eighth edition, so strict current submissions should also follow the current MLA Handbook or the governing house style.
Further guidance
Example
MLA-style invented contrast: a formally titled trilogy such as *The Northshore Trilogy* can be treated as a work title; an informal phrase such as the “Harbour books” is not automatically italicized.
Practical Application
Do not italicize a series name automatically. Under the cited MLA guidance, first determine whether the wording functions as the formal title of a work/trilogy or merely as an informal series designation.
Reader Check
Ask whether the series wording is itself formally titled on the work or is just a descriptive grouping used by readers, publishers, or marketers.
Recommendation
In MLA-style work, italicize a series/trilogy name when it is itself the formal title of an independent work; do not assume every informal series designation takes italics.
Sources and evidence
Sources are shown with the role they play in this guide. Historical or style-sensitive claims are kept within the evidence boundary described above.
- How do I style the title of a trilogy or informally titled series? (opens in a new tab)MLA Style Center · MLA Style Center guidance distinguishing a formally titled trilogy/work from an informal series designation for title styling.