The former prime minister was heckled and jeered by anti-war protesters at his first book signing in the city’s O’Connell Street.
The missiles did not hit Mr Blair, whose memoir, A Journey, was published this week.
Security was tight as up to 300 campaigners carrying flags and banners chanted “arrest the butcher Blair”, “hey hey Tony hey, how many kids have you killed today?” and “Tony Blair war criminal”.
Angry activists clashed with gardai as they tried to push down a security barrier outside the Eason store.
Hundreds more queued quietly in the rain by a side door to meet Mr Blair, who arrived at about 10.30am – some abused by protesters as they left the store.
Kate O'Sullivan, who attempted to make a citizen's arrest on Mr Blair, said: "Immediately five security people grabbed me, started dragging me off.
"I cried out 'there was half a million people dead in Iraq, how can you live with yourself, you've committed war crimes'."
Undercover detectives earlier mingled with the crowds taking names from known activists before Mr Blair arrived.
The city tram service was suspended as Gardai blocked off streets surrounding the city centre store.
A Garda spokesman said four men – two aged in their late teens and two in their mid-30s – were arrested during the protest. They were later charged under the Public Order Act and released from custody.
It was the first book signing since Mr Blair's memoirs were released this week.
The book tells of his life in politics and has become one of the fastest selling autobiographies on record.
Mr Blair, who gave his first live television interview to Irish state broadcaster RTE on Friday night, was expected to spend about an hour at the store.
During the interview Mr Blair said the Northern Ireland peace process was one of the few moments in politics that he felt really proud.
Now the Middle East peace envoy, he described watching former Northern Ireland First Minister Ian Paisley and Deputy First Minister Martin McGuinness sitting together publicly for the first time.
"It was just such a strange and extraordinary sight and one of the few times in politics I felt really proud actually," Mr Blair said.
Angry activists clashed with gardai as they tried to push down a security barrier outside the Eason store.
Hundreds more queued quietly in the rain by a side door to meet Mr Blair, who arrived at about 10.30am – some abused by protesters as they left the store.
Kate O'Sullivan, who attempted to make a citizen's arrest on Mr Blair, said: "Immediately five security people grabbed me, started dragging me off.
"I cried out 'there was half a million people dead in Iraq, how can you live with yourself, you've committed war crimes'."
Undercover detectives earlier mingled with the crowds taking names from known activists before Mr Blair arrived.
The city tram service was suspended as Gardai blocked off streets surrounding the city centre store.
A Garda spokesman said four men – two aged in their late teens and two in their mid-30s – were arrested during the protest. They were later charged under the Public Order Act and released from custody.
It was the first book signing since Mr Blair's memoirs were released this week.
The book tells of his life in politics and has become one of the fastest selling autobiographies on record.
Mr Blair, who gave his first live television interview to Irish state broadcaster RTE on Friday night, was expected to spend about an hour at the store.
During the interview Mr Blair said the Northern Ireland peace process was one of the few moments in politics that he felt really proud.
Now the Middle East peace envoy, he described watching former Northern Ireland First Minister Ian Paisley and Deputy First Minister Martin McGuinness sitting together publicly for the first time.
"It was just such a strange and extraordinary sight and one of the few times in politics I felt really proud actually," Mr Blair said.
