emphasis on the wrong syllable

I've been enjoying this website lately. It has very short audio clips from quite a few children's authors. In each clip, the author tells how his or her name is pronounced. I'd mastered Scieszka, de Paola, Riordan and Patron years ago (or months, in Riordan's and Patron's cases), so I thought this would be agreeable filler for me. I clicked on a few authors whose books I enjoy: David Lubar, Tamora Pierce, etc. Turns out I've been mispronouncing some of these names! Sorry, Tamora Pierce!
Of course, my new knowledge will only serve to make me more pretentious. (That's why I avoid the word "forte" in spoken conversation - unless I'm with the few, the merry few, the band of brothers and sisters who pronounce it correctly).