Deletion of Opposing Viewpoints series

Comment: A quick look at WorldCat has the https://www.worldcat.org/search?qt=worldcat_org_all&q=opposing+viewpoints number of holdings for books in the series pretty high. Most US public middle and high schools had many of the titles in this series and/or in the similar Contemporary Issues Companion series; the books were used by virtually all traditional students in English, social studies, and speech classes. Most individual titles will not pass , but there are reviews of a few here and there, and it makes something collectively, so  applies
Stance: keep
Cited policy: Wikipedia:Notability (WP:NBOOK||WP:PRESERVE)