Concatenating Multiple Returns On One Field Only

I have a SQL query that returns several fields from several tables, eg. Title, Subtitle, Author, Binding and Imprint. When these are returned everything seems rosy until there are two authors linked to one title. When this happens Title, Subtitle, Binding and Imprint are repeated which is not required. Is there a way to concatenate the authors from multple records to return a single title with the concatenated authors, instead of repeating titles due to multiple authors?.

Example:
A query may currently return:
Title1 - Subtitle1 - Author 1a - etc
Title1 - Subtitle1 - Author 1b - etc
Title1 - Subtitle1 - Author 1c - etc
Title2 - Subtitle2 - Author 2a - etc
Title3 - Subtitle3 - Author 3a - etc

When I would like
Title1 - Subtitle1 - Author 1a, Author 1b, Author 1c - etc
Title2 - Subtitle2 - Author 2a - etc
Title3 - Subtitle3 - Author 3a - etc

My actual SQL code, if you are interested, is:

SELECT dbo.edition.ISBN, dbo.edition.title, dbo.party.first_name+' '+dbo.party.surname as name, dbo.edition.reviews, dbo.edition.long_blurb, dbo.series.series_id, dbo.series.series_number,
dbo.series.series_title, dbo.edition.sub_title, dbo.edition.about_author, dbo.edition.short_blurb,
dbo.series.editors_affiliations, dbo.title.contents, dbo.title.affiliations, dbo.series.series_editors
FROM dbo.edition INNER JOIN
dbo.series ON dbo.edition.series_id = dbo.series.series_id INNER JOIN
dbo.title ON dbo.edition.title_id = dbo.title.title_id INNER JOIN
dbo.agreement ON dbo.edition.edition_id = dbo.agreement.edition_id INNER JOIN
dbo.role ON dbo.agreement.role_id = dbo.role.role_id INNER JOIN
dbo.party ON dbo.role.party_id = dbo.party.party_id