Holmberg also published various literary and political works, like Per Stigmans äventyr, Till kamp för Sveriges kommunistiska parti, Fredlig kontrarevolution, Hur ungdomen arbetar samt varför den bör ansluta sig till Sveriges Kommunistiska Ungdomsförbund and Mot rådande vind: kommunistiska texter (edited by Robert Aschberg).
Robert Louis Stevenson | Robert De Niro | Robert E. Lee | Robert Mugabe | Robert Redford | Robert Burns | Robert Bosch GmbH | Robert | Robert A. Heinlein | Robert Schumann | Robert Browning | Robert Rauschenberg | Robert Plant | Robert Altman | Robert Mitchum | Robert Frost | Robert Southey | Robert F. Kennedy | Robert Maxwell | Robert Graves | Robert E. Howard | Robert Fripp | Robert Fisk | Robert Rodriguez | Robert Motherwell | Robert Lowell | Robert Johnson | Robert Duvall | Robert Boyle | Robert Walpole |
Then he went on to make a few movies with the American actor David Carradine, and action-movies like Blood Tracks, Eagle Island, Spökligan, SilverHawk, The Hired Gun, Animal Protector, The Forgotten Wells, The Mad Bunch, Fatal Secret, The Russian Terminator, Babysitter and the short-lived Robert Aschberg-series Nordexpressen.