Buy their book
I know that this one’s a bit obvious, but if you think you’ll enjoy the book, buy it! It’ll encourage your friend to carry on writing and can help them to get picked up by a traditional publisher if that’s what they want. They’ll be posting on social media to let you know how to get your copy, so it’s good to buy the book when you see one of these posts. That way, you’re less likely to forget.
If you’re the author and you’re marketing your book, post on social media more than you’re comfortable with. People don’t always see your posts. I thought I’d done far too many posts about my book, ‘Unflip’, but there are still people who haven’t heard about it when I talk to them in person.
Share and engage with their posts
Marketing a book is hard work and your friend will be putting in a lot of effort to talk about it on social media. If you can like, comment and share posts about the book it’ll make your friend happy, and it helps their marketing to go further. Even if the book isn’t for you, you can still share it with your friends. You never know who might be interested. You can also tag people in the comments on marketing posts if you know it’s their kind of thing.
My book is about my experience with chronic illness. You might know someone with the same experience or condition, but a lot of people don’t talk about it and may even hide their condition. You never know who you might be helping.