Is it advantageous for authors to work as an LLC? If I'm going to be writing a lot of books, it seems to make sense to work with publishers from an LLC and get some protection from spurious lawsuits. (Of course, this doesn't protect someone from plagiarism.) I'm in the USA.
If an author does something which gives some other person grounds for a lawsuit, an LLC will not in general offer any protection to the author. For example, if a work is held to be defamatory, or an infringement of copyright, the author could be personally liable for damages, and an LLC would not avoid that.
An LLC can help with tax issues in some cases. That depends on the details of the author's situation, including which country the author is in.
Many people starting or running a small business use an LLC structure. As I understand it, the main benefit of this is that it can limit liability for debts. If a person runni8gn a business takes on debt for business expenses and the business is unable to to earn enough to pay that debt, the owner can shut down the business and take it through bankruptcy without needing to go through a personal bankruptcy. This is not always possible, it depends on the details of the local bankruptcy laws.