Hello,
When you set fetch info from Library of Congress (DB:voyager) or any other (except yours own), any info what was before will rewrite.
Can you send ISBN book what info you wish take ?
When you install Book Library, do you install YAZ extension for it ? That extension important for take info from Library of Congress
We check exist or not YAZ PHP extension at time Book library install
Thanks,
OrdaSoft team