If you have a lot of exciting content on your page, then this will not be difficult. You will just need to contact an advertising company, and they will promote your book. If you have just started your Instagram page, you first need to attract people's attention. When I started my blog on Instagram, there was nothing complicated about it ( although I spent a lot of effort). I did the first thing to put up interesting content and
more likes and real Instagram followers. Two months later, my page was already like a blog. Over time I had a considerable number of subscribers.