J.D. Welch, author of the children's mystery novels 'The Einstein Code' and 'The Darwin Code', will be attending the Mauldeth Road Festival where she will be available to sign copies of her books. In her book The Darwin Code J.D. Welch uses her love of science and puzzles to help her characters try to solve two mysteries whilst also delivering an interesting and understandable insight into human genetics. Set against a backdrop of the streets and colleges of Oxford, a story of intrigue and suspense unfolds. When Ben Baxter and his mother Sue escape from a horrific ordeal, their lives remain in danger as they race to prevent a deadly poison being launched. For Ben, this also brings the opportunity to discover the answer to a very important question; who is his father?