thank you for all your answers guys I will check those books.I already have Morgantheler's which I devoured. If Death & Co does not deal with technique as deep as Morgantheler's, it is still OK. I already intend to buy it just for their amazing recipes. Youtube, of course, is an amazing tool. I am not talking about tutorials, which are necessary certainly but quite basic after all, rather about simple videos of great bartenders performing which I can take as example. I know that simply trying to copy them would be foolish but they are great inspiration and that would help me find my own style afterwards. I practice every day and I see progress but I, of course, need to perfect my skills. I am so amazed when I see videos of Luca Cinalli from Nightjar bar for, instance, on Youtube. His rolling style is insane, such dexterity is really unbelievable. His shaking style is also pretty impressive even though it looks like that it quite solicits shoulders.