All through late 2003 and the summer of 2004, Roderick and Brian worked together, and in 2005 Roderick finally self-published the first book in the Tunnels series, then known as The Highfield Mole.
Pod koniec 2003 i latem 2004 roku, Roderick i Brian pracowali razem, zaś w 2005 opublikowali pierwszą książkę z serii Tunele, która wtedy nosiła tytuł The Mole Highfield.