Tess Eagle Swan was raised in a small Hertfordshire village. Tess found her life full of challenges but, overcoming much adversity, she eventually found the inner strength to leave her chaotic London lifestyle and go to Peru, where, after learning about the ancient healing cultures, she set out on a path which would lead her to Kratu.

Tess had always struggled with communication but it wasn't until she was fifty-four that, with Kratu by her side, she was formally diagnosed with ASD (Autistic Spectrum Disorder). For the past nine years, Tess has devoted her life to training Kratu, and her other dogs whilst also raising awareness of animal welfare issues and autism-related causes. She supports the cross-parliamentary group APDAWG and is now a dedicated dog welfare advocate and rescue dog ambassador. Her and Kratu are also ambassadors for Anna Kennedy Online, an autism charity. Kratu, now formally her Assistance Dog, did therapy work at the local primary school but is now retired.

Lynne Barret-Lee was born and raised in London and now based in Cardiff, Wales. Lynne has been a full time author since the mid-1990s. She has ten novels and over a hundred published short stories to her name, as well as two guides to writing fiction, which she teaches in her spare time. She is the ghostwriter of the bestselling memoir Fabulous Finn.