Two events are particularly important as far as I'm concerned:
"Instincte umane" - Millenniun Books launch - Saturday, June 1st, at 16:30, at Art/Paladin stand.
"Calatorii in timp" - Nemira launch - Sunday, June 2nd, at 14:30.
I won't be there, but that doesn't mean you can't go and buy some books. Aside from those mentioned above, I also recommend you the following (all from Millennium Books):
"Efectul de nautil" by Ioana Visan
"Zombii: Cartea mortilor vii" edited by Mircea Pricajan
"Cele 1001 de scorneli ale Mosului SF" edited by Stefan Ghidoveanu
"Steampunk: A doua revolutie" edited by Adrian Craciun
"Dansand pe Marte si alte povestiri fantastice" edited by Michael Haulica
Update: Here's a video from the book launch courtesy of Assassin CG.