How did you promote and launch your book?

I published a paperback book in lithuanian: "Tinginio manifestas", about positive parts of laziness. I just spammed the heck out of my blog mailing list :-)

Wasn't the best promotion, but I did manage to sell out half of the printed books (~500/1000, book readership in Lithuania isn't huge) this way.

Nowaday I would also use Google/Facebook ads. It would cost a bit, but it should still be profit. (With an added bonus of using those ads as self promotion for your name, useful for your later books.)

I wrote and sell an ebook, "Design Patterns for Vue.js" [0]. I promoted it in several ways:

1. Twitter. My audience is pretty small. 2. I created a YouTube channel [1] and recorded some videos around topics from the book. I linked to the book in the description and mentioned it at the start of the videos. 3. I put a small advertisement on another free ebook I wrote that relates the same topic [2].

I've sold a couple hundred copies and made about $5k. And I get to say I'm an author!

[0] https://lachlanmiller.gumroad.com/l/vuejs-design-patterns [1] https://www.youtube.com/c/lachlanmiller [2] https://lmiller1990.github.io/vue-testing-handbook/v3/

What type of book is it? Tech, fiction, non fiction etc? Channels would be very different based on the type of book. Self published or via a publisher?

isn't the publisher / printing co. have their own fix channel to do so?