Julia Burchell, author for Collins, shares her journey to becoming a published author and her top three tips for writing textbooks:

Tip 1 - It's not about setting tasks but thinking about the whole series of skills you're trying to teach

Tip 2 - Timing of your writing

Tip 3 - Keep your glossary and answer log as you go along

Find out how getting stuck in the mud in Costa Rica led to a chapter on metaphor and why you should look to the world around you for inspiration.