@ Hotel Nikko Rooftop Pool & Pet Terrace, 222 Mason Street. Hotel Nikko’s canine officer Buster will host a party introducing the new book and unveiling a bronze Buster bust. 5-7pm. reginam@charleszukow.com

@ Google Headquarters, 188 Embarcadero. At this reception, hosted by Google, the next designs for Rainbow Honor Walk plaques will be unveiled. 5:30-8:30pm. http://www.rainbowhonorwalk.org

@ GLBT History Museum, 4127 18th Street. Author Lance Ringel will present a dramatized reading with music from his novel Flower of Iowa, a carefully researched work about two soldiers who fall in love in 1918 France. 7-9pm. http://www.glbthistory.org

@ GLBT History Museum, 4127 18th Street. Author Lance Ringel will present a dramatized reading with music from his novel Flower of Iowa, a carefully researched work about two soldiers who fall in love in 1918 France. 7-9pm. http://www.glbthistory.org

@ Manny’s, 3092 16th Street. Senator Klobuchar (D-Minnesota) is running for President. 8pm. http://www.welcometomannys.com