This is a first preview of the book Handheld Binoculars: Function, Performance, Selection, which has appeared in German language in December 2013. Publisher of the German edition: Europa-Lehrmittel (Europa-Nr. 57747, ISBN 978-3-8085-5774-7, 200+ pages, 36 Euro). Currently, the translation of an extended version into English is under way (publisher still to be found), and a few reading samples are given here. Note: This is work in progress, all contents are preliminary, and continuously updated. Last updated: Feb. 2017.