diff --git a/book.json b/book.json
index f364ae9..c4336c6 100644
--- a/book.json
+++ b/book.json
@@ -2,8 +2,6 @@
         "title": "Cooperative Software Development",
         "authors": [ { "id": "ajko", "name": "Amy J. Ko", "url": "https://faculty.washington.edu/ajko" }],
         "license": "[Creative Commons Attribution-NoDeriviatives 4.0|https://creativecommons.org/licenses/by-nd/4.0/]",
-        "cover": "|cover.jpg|A photograph of a racially and gender diverse team of six making decisions.|Software engineering is inherently social.|Shutterstock|",
-        "unknown": "|error.png|A screen shot of a Linux operating system kernel panic|Uh oh, something went wrong|William Pina|",
         "images": {
                 "cover": "|cover.jpg|A photograph of a racially and gender diverse team of six making decisions.|Software engineering is inherently social.|Shutterstock|",
                 "unknown": "|error.png|A screen shot of a Linux operating system kernel panic|Uh oh, something went wrong|William Pina|"