Proof that you don’t need big halls and big bucks to hear top notch musicians was proven by Ismael Alcalde‘s appearance on a balmy Saturday evening in the unlikely location of a public library. As it proved though, books are not just good to read, they also provide a good acoustic environment. The solar roof of the Stadtbucherei St Nikolaus in Bonn-Kessenich also sent soft and shimmering Summer evening light onto the 100 or so people enjoying the music.