A randomly-selected work from a number of randomly-selected authors:
SELECT
WORKID,
AUTHORID
FROM (
SELECT TOP 10
AUTHORID
FROM dbo.LITERARYWORKS
GROUP BY MASTNUM
ORDER BY NEWID()
) at
CROSS APPLY (
SELECT TOP 1
WORKID
FROM dbo.LITERARYWORKS
WHERE AUTHORID = at.AUTHORID
ORDER BY NEWID()
) MyAlias
For fast, accurate and documented assistance in answering your questions, please read this article.
Understanding and using APPLY, (I) and (II) Paul White
Hidden RBAR: Triangular Joins / The "Numbers" or "Tally" Table: What it is and how it replaces a loop Jeff Moden