Writing & StyleStyle guide

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.

Quick answer

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

Core Issuehow to style a formal book-series or trilogy title when the series name may itself be a titled work
Registeracademic, edited, and style-governed writing
RuleMLA guidance distinguishes a formally titled trilogy/work from an informal series designation; a formal work title can be italicized, while an informal series label is not automatically italicized.

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

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.

  1. 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.

Related guides

Writing & Style

Are Book Titles Italicized?

Book titles are normally italicized in MLA-style prose because books are independent long-form works. Other style systems may have their own conventions, so follow the required style for the document.

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