Series checklist
Sigma Force
Books
2
Numbers
2 to 3
Published
2004 to 2006
The complete set
Values coming soon
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| No. | Title | Year | Value |
|---|---|---|---|
| 2 | Map of Bones First | 2004 | – |
| 3 | Black Order First | 2006 | – |
Collecting guides
All guidesKnow what you are collecting
3 min read
How to Identify a First Edition
A true first edition is a copy from the first printing (first impression) of the first edition, so you check …
Read the guide →3 min readHow to Grade a Book's Condition
Collectors grade books on a six-step trade scale from Fine to Poor, and grade the book and its dust jacket …
Read the guide →2 min readDust Jackets: Why They Matter
For most books published since the 1920s, the original dust jacket carries a large share of the value, often most …
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