The blast, caused by a small explosive device, came after a phone call was placed to a left-wing newspaper warning of the imminent attack.
Police cordoned off the area in central Athens after the last night's attack.
The bookshop, which has been the target of other attacks in the past, suffered minor material damage.
The building where the bookshop is housed is also home to the Athens prosecutor of the appeals court.
In the past 10 years, hundreds of arson and bomb attacks have hit financial, diplomatic and political targets, with police blaming extremist groups.
Disclaimer: No Business Standard Journalist was involved in creation of this content
