TITLE: Books you would like to see translated into English
QUESTION [78 upvotes]: I have recently been told of a proposal to produce an English translation 
of Landau's Handbuch der Lehre von der Verteilung der Primzahlen, and
this prompts me to ask a more general question: 

Which foreign-language
  books would you most like to see translated into English?

These could be classics of historical interest, books you would like your 
students to read, books you would like to teach from, or books of use in 
your own research.

REPLY [3 votes]: I hope I did not miss that in one of the previous answers, but a book worthy of an English translation is "Théorie des distributions" by Laurent Schwartz. The later edition combined Vol I and II as a single book. One could also consider translating Vol III and IV which are his two long papers on vector-valued distributions. About the latter, see this related MO question: English translation of Schwartz's papers on vector-valued distributions