Experimentation doesn't always find an adequate place when it's carried out by a bluesman. It is also not well received and probably understood by a good part of the aficionados. But when a blues musician plans how to evolve through knowledge, the twelve bars stop playing and are translated into other more sophisticated, progressive and transforming notes that force new demands and commitments to both musicians and listeners. Londoner Geiger von Müller is a bluesman who brings about a transformation in his risky and competent music. His songs are sound experiments in which his excellent quality as a guitarist and performer doesn't overshadow the perception of hovering over a sound building with open windows and from which different sensations emerge from each one. Müller is a modern bluesman, still atypical, who shows one of the ways in which blues music can continue to go forward, overcoming old structures, with new approaches and real arguments to assimilate them. Geiger von Müller began recording in 2018 and "Slide Sonatas I" is his second album and it may not be a comfortable album or one that is easy to assimilate, but the guitars it contains are highly persuasive and build an indescribable sound universe. A bluesmen with his guitar, without singing, sliding his bottleneck over the strings and replacing the orthodox with the contemporary.