Niche topic books earn very little income for the author. Publishers are generally disinterested in anything that doesn't sell in the 10,000s. There is insuffic

Niche topic books earn very little income for the author. Publishers are generally disinterested in anything that doesn't sell in the 10,000s. There is insufficient return on their investment in time and money. Hosting your own book is potentially too much bother. Using a self-publishing approach, e.g. Amazon, Lulu, etc is far less hassle. You might want to consider the combination of print-on-demand together with eBook technologies. POD is great if you want to give books away as a value add to any consulting activities. With niche books your only effective option is to do all the marketing yourself. That can be a lot of effort if you want to gain any sort of traction for your book. Perhaps you are also offering consulting and related services. Editing is the biggest effort that publishers provide. You might have to consider getting a professional editor unless you have exceptional writing skills and attention to detail. You can use freelancers to do any graphic and cover design. Just get started with the writing and see how you progress. Many people embark upon book writing and then falter. If that happens to you, you can pivot and release the material as a blog.