@laumapret I'm not @sinituulia and I haven't done a cycling costume (yet :) ), but this is the list of drafting manuals and sewing books that I've used
sewing-patterns.trueelena.org/…
Rather than “useful for people of the 21st century” I can say that they are “useful for a very specific nerd who lives in the 21st century (i.e. me)”, but maybe other people have the same set of quirks as I have and they can be useful :)