- Series: Black Oak Series Record # 6154
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Note: "Black Oak Security is a crack team of private investigators led by brilliant, enigmatic Ethan Proctor. From everyday illegal activities to encounters of a more questionable kind." — quoted from the back cover of "Winter Knight" from ROC/New American Library.
- Black Oak
- 1 Genesis (1998) by Charles L. Grant [also as by Charles Grant]
- 2 The Hush of Dark Wings (1999) by Charles L. Grant [also as by Charles Grant]
- 3 Winter Knight (1999) by Charles L. Grant [also as by Charles Grant]
- 4 Hunting Ground (2000) by Charles L. Grant [also as by Charles Grant]
- 5 When the Cold Wind Blows (2001) by Charles L. Grant [also as by Charles Grant]
- Black Oak: Genesis (excerpt) (1999) [SF] by Charles L. Grant [only as by Charles Grant]