These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Genius Bonus: For those who know Latin, the third book is more easily understood. Nidus ex magnificum= Nest of the magnificent.
Ho Yay: Pellinore/Will. "Will Henry will never leave me," indeed.
Regarding Will's father's relationship with Pellinore:
"It is no exaggeration to say that my father loved him with an affection that bordered on idolatrous worship..."
Pellinore is a Ho Yaywhore in the second book, having moments with Will Henry, his best friend John Chanler, his former mentor Dr. von Helrung, and even some of the other monstrumologists who only have small parts.
Will: "I've never seen him cry - ever. He's come close before...but it was only for himself. I think he loves Dr. Chanler very much."