Not a burning question, a merely lukewarm query

A question to the many millions of people who know a lot more about Facebook and promoting stuff online than I do.

Conventional wisdom has it that as a person who writes and tries to flog books, I ought to have a Facebook page.

I already have four Twitter accounts, two blogs and a static site and can’t keep up with all that as it is. If I were diligent about updating my digital online empire, I would simply have no time to write the stories I am supposed to be promoting.

So, do I really need a Facebook page too? And what would I put on it different to the content of the other bits and pieces?

Is an FB page helpful?

Do you have any thoughts on the matter?

I thank you in advance for doing my thinking for me.