The World Without Us perspective. Chauncey Mabe of the "South Florida Sun-Sentinel" calls the book "one of the most satisfying environmental books of recent memory, one devoid of self-righteousness, alarmism or tiresome doomsaying". Tom Spears of the CanWest News Service concludes "it's more a portrait of ourselves, taken through an odd lens" and "[s]ometimes an obituary is the best biography". The book is categorized as non-fiction science but some commentators emphasize it may be better described as speculative fiction. "The World Without Us" is grounded in environmental and science journalism. Like other environmental books, it discusses the impact that the human race has had
The Heart Never Lies Singles Chart, being beaten by Take That's "Rule the World"' which charted at number two, and Leona Lewis' "Bleeding Love", which debuted at number one. Although "The Heart Never Lies" debuted at number three, it sold 9,000 more copies than their last number one hit "Baby's Coming Back" did in its first week (40,000 against 31,000). "The Heart Never Lies" also reached number sixteen in Ireland. "The Heart Never Lies" was played for the first time at V Festival on 18 August 2007. The band also performed the song at the Blackpool Illuminations on 31 August 2007. The performance was