No. You only need to touch base to 1. add the new, known spell in question to your library; 2. modify your spellbook’s contents or to make a new spellbook.
Getting the known spell into your library is important so that you can update or make new spellbooks and not have to rely on scrolls. It’s much more time consuming and costly (in terms of Checks or Lifestyle cost) to scribe scrolls than to get the spell into your spellbook. the tradeoff is that to do the latter you need to get back to your library.
The exception is a spell learned from you Mentor, which is automatically inscribed into your spellbook and learned (and thus, Known). However, it’s not added to your library until you go back to your hometown or wherever your library is. That means if your spellbook is lost you could still scribe a scroll of the spell so you could cast it, but again, that is very costly and not ideal.