'Expanded' spring for Eric Kraft. (publishes his sixth Peter Leroy novel, 'At Home With the Glynns,' and a computer expanded version of the series, and paperbacks of his backlist titles) (Brief Article)

AS ERIC KRAFT sees it, his fictional world has always been hypertextual. In five serial works, the comic novelist has peopled the suburban world of Peter Leroy with references and plot twists providing links beyond the covers. Now, as he extends the story in a sixth book, At Home With the Glynns ($20), coming from Crown in April, that same month Voyager will issue The Complete Peter Leroy (So Far) ($24.95, tentative), an Expanded Book computer disk version of four previous novels. And this Expanded Book offers a new twist: while previous efforts in Voyager's series provide supporting documents, Kraft's is the first to include new creative material.

Also, signaling a …