Add image before bookdown title

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5

I think you can use Javascript for that. If you had this code at the end of your index.html, it should work I think. Tested on a minimal book.

```{js, echo = FALSE}
title=document.getElementById('header');
title.innerHTML = '<img src="https://cdn.pixabay.com/photo/2017/04/11/15/55/animals-2222007_960_720.jpg" alt="Test Image">' + title.innerHTML
```

The bookdown title is in a div of id header so that helps. echo = FALSE is required to include the JS code in your output html but without the chunk visible.

Hope it helps.