"I'd been writing poetry for a while on Facebook and my friends loved it. I thought, how can I make a living from doing that?" he said.
"You get hugs when you connect with someone - because I write from my heart, and they appreciate that."
"We have customers who are always looking to find out more on topics," he says.
"As a specialist we can source books from all over the world to satisfy what they want to find out, also giving them the opportunity to source books that are printed and published overseas."
"Zines have always been a really underground thing; creators used to have to mail them out, then shops started popping up," she said.
"Now, people get found out because of us."
"It's from a Simpsons quote: 'a noble spirit embiggens even the smallest man'," he said.
"It's not the meaning of the quote so much as the fact the writers of the Simpsons are actually mathematicians; there's a lot of mathematics hidden in their show. We always liked how they brought together the two disciplines."
Warren has been in the book trade for about 30 years, firstly as a book designer and now with Embiggen. He has succeeded in his goal of creating a store that pays respect to books, rather than treating them like items in a supermarket.
"It's a great system - some people don't have access to things like this otherwise," she says.
"Reading has really helped me in my lifetime and I'm glad it's been made so easy with an initiative like this."