How do I get it? It was during the Aftermath Sale in 2011 where the early birds got the chance by just telling the staff in-charge a secret password (the password was announced in their blog or fb.. can't really remember). So last Saturday I got the email to collect the preview pass at BookXcess.
But don't be disheartened if you don't have the preview pass cos' BBW just announced that they will be opening for 63 straight hours from 6.30am on 7th December until 9.30pm on 9th December.. so be there at wee hours and beat all the traffic! Check this out