Bello has written four books. Les Funambules (ISBN 2070745023), a collection of short stories, was published in 1996. Bello's first novel, Éloge de la pièce manquante (ISBN 2070749665) was released in 1998. It was the runner-up for the French Prix Novembre literary prize and released in English with the title The Missing Piece (ISBN 0156013371). In 2007, Bello released, Les Falsificateurs (ISBN 2070355276) which is the first installment of a two-book series. Les éclaireurs (ISBN 2070124266) which is the second installment of this two-book series was released in March 2009.

In 1991, Bello founded Ubiqus, a company offering various services for meeting planners. He sold it in 2007. That same year, he launched the Rankopedia website.