After many years of abstinence I decided to build something (amplifiers, radios) with tubes at the end of 2016. For this I had to re-read myself into this area. Fortunately, there are contemporary books on this subject and wonderful old literature that can be found on the Internet. I have listed a small part of my library here. Maybe someone could use the clues...
Vacuum Tube Amplifiers Basics
EJ Jurich
Revised April 2017
ISBN: 978-1500938864
Valve Amplifiers
Morgan Jones
Fourth Edition
Elsevier 2012
ISBN: 978-0080966403
Designing Tube Preamps for Guitar and Bass
Merlin Blancowe
Second Edition
Wem Publishing, 2012
ISBN: 978-0956154521
Designing High-Fidelity Tube Preamps
Merlin Blancowe
Blancowe, 2016
ISBN: 978-0956154538
Modern High-end Valve Amplifiers
Menno van der Veen
elektor, 1999
ISBN: 978-0905705637
High-end Valve Amplifiers 2
Menno van der Veen
elektor, 2010
ISBN: 978-0905705903
DVD Workshop Moderne Röhrenelektronik
Menno van der Veen
elektor, 2012
ISBN: 978-3895762642
Trans Röhrenverstärker
Menno van der Veen
elektor, 2015
ISBN: 978-3895763076
Röhrenverstärker-Schaltungen
Peter Dieleman
elektor, 2009
ISBN: 978-3895762222
High-END mit Röhren
Gerhard Haas
Neuauflage
elektor, 2017
ISBN: 978-3895763236
Radiobasteln mit Elektronenröhren
Klaus Röbenack
Shakerverlag, 2013
ISBN: 978-3844018646
Selbstgebaute Röhrenradios
Andreas Hartung
vth, 2013
ISBN: 978-3881808866