I don't know whether this site is relatively new, but I don't find an important tag here, that I use often on Physics SE or other science SE.
A new tag should be implemented: 'resource-recommendations'.
This tag shall adhere to all questions which ask for books, papers or alike, in the field of electronics, but not hardware or software recommendations. It is necessary to have a tag on resource-recommendations so as to enable users to ask for books in this vast topic, as books are the stepping stone to gaining any knowledge in any field.
The help or wiki to the tag may be:
Questions asking "What is a good book about X?" or more generally, "What should I read to learn about X?", typically where there is not a single authoritative reference.
There is one tag called reference, but that neither has a help page, nor are there any questions related to resource-recommendations under it.