Depends I like the earlier stuff more so.
Books like; by Jack Yeovil
Come back Tour; alternate future with Elvis presly as a detective.
Ghost Dancer; by Brian Craig
Compilation shirt stories; Route 666
Drachenfels; by Jack Y is especially good vampire story.
you also have the following
Shadow Breed & Konrad; by David Ferring
Storm warriors & Zaragoz; by Brian Craig.
Red Thirst; Wolf Riders; Ignorant Armies compilation short stories where a lot of characters first made thier appearance.
As well a number of early 40K books, like inquisitor & death Wing by Ian Watson
I've tried to read some of thier stuff latly and for what ever reason, find that most of it is really ho hum. ?? The issue is for me, that there are a lot of much better books / authors to read. ie [Game of Thrones; by george martin] So when you get an average story line it's meh.
So if you see some of thier older stuff IMo grab it.