Adventure cyclist Jamie Bianchini has spent the last eight years on a tandem bicycle. His trek took him throughout a whopping 81 countries, with the back seat always open for anyone to join him. This experiment in community culminated in Bianchini’s new book, A Bicycle Built for Two Billion, which chronicles the trek and the many characters he encountered along the way. Bianchini brings stories, photos, video, music and his family with him for an inspirational multimedia presentation and reception; he’ll be socializing, speaking and signing books on Monday, Oct. 12, at Aqus Cafe, 189 H St., Petaluma. 6pm. Free (RSVP requested). 707.778.6060.