The Bitcoin Killer

Four minutes and thirty seconds.
This is the exact time Special Agent Walter Davies will arrive early to any meeting. Coupled with the fact he detests small talk and struggles to understand humour, the ASIS agent is ostracised by his colleagues.
Following on from a botched operation, Walter is sent to a small mining town in Tasmania to investigate the murder of a fellow undercover agent, as part of an international conspiracy...
But can the best agent from ASIS defeat the unknown threat, which uses Bitcoin to hide its every move?