An Audiobook can be of Document Type Book. Audiobook are added to existing Book record as additional e-item with description 'Audiobook'. If there is no record, a Book record is created with an e-item with description 'Audiobook'. ISBNs identified as '(electronic audio bk.)' (020 subfield q) should refer to Material 'Audiobook'. The other ISBNs should be treated as usual. Important: <leader> field should include value im to identify as audiobook
Display Audiobook in the Formats in the facets (based on the description in the e-items): e-book/ebook (to be standardized - please bulk update to 'e-book') -> Facet 'E-book'; Audiobook -> Facet 'Audiobook'; in the Filter by Format.
For Deletions, distinguish Ebook/Audiobook with the LDR field (am (Book)/im (Audiobook)) to remove only the corresponding e-item. The rest of deletion process would as usual.
<leader>field should include valueimto identify as audiobook