The growth in the digital economy both powerfully drives competition, but also provides challenges to global antitrust enforcement. This E-commerce Competition Enforcement Guide, edited by Claire Jeffs, looks at whether established competition tools are sufficient to deal with the challenges of the online world. Drawing on the collective wisdom and expertise of 48 distinguished experts from 22 firms and competition authorities, the Guide provides insight on the differing approaches adopted by enforcement agencies and whether a balance is being struck between maintaining a vigilant approach to the digital economy and allowing competition to flourish.