How are sales made?

how can get my books to the readers it deserves

How long should I wait before chasing a book blogger who has not replied?

I sent review copies to six bloggers three weeks ago and heard back from one. Is it normal to follow up, and how long should I leave it before it starts to look pushy?

Is a BookBub Featured Deal worth the money, or are the cheaper promo sites good enough?

I'm planning a price promo and keep seeing BookBub Featured Deals recommended, but they're expensive and hard to get accepted. Are the cheaper newsletter promo sites a reasonable substitute for a first-timer?

Do Amazon ads actually work for a debut author with no reviews yet?

I keep hearing Amazon ads are essential but also that they burn money for new authors. I've got zero reviews so far. Is it worth starting ads now, or wait until I have some social proof first?