Hugo Award for Best Series

The Hugo Award for Best Series is one of the Hugo Awards given each year for science fiction or fantasy stories published in or translated into English during the previous calendar year. The award is available for series of science fiction or fantasy stories consisting of at least 3 published works totaling at least 240,000 words, with at least one work released or translated into English during the previous calendar year. A losing finalist becomes eligible again with the publication of at least two new works totaling at least 240,000 words. The Hugo Award for Best Series has been awarded annually since 2017. It was first presented in that year as a one-time special Hugo Award in advance of a vote to make it a permanent category, and was ratified as such by members of the World Science Fiction Society that year.

From the Wikipedia article “Hugo Award for Best Series”, licensed under CC BY-SA 4.0.

Check the official rules of the Hugo Award for Best Series for the current eligibility window, accepted formats, residency or language requirements and any entry fee. For most established prizes the publisher submits on the author's behalf, often with a limit on entries per imprint.

If you are self-published, look for an explicit statement that independently published books are accepted, and budget for entry fees and copies for judges.