Support for Chancellor Angela Merkel's conservatives has nudged higher, an opinion poll showed, but the weakness of two smaller parties highlights the trouble she may face building another centre-right coalition after Germany's 2013 election.
Former German central banker Thilo Sarrazin, whose musings on Muslim immigrants sparked outrage in 2010 has triggered fresh controversy with a book that paints Germany as the Euro zone's hostage, forced to pay out vast sums to atone for the Holocaust.