during the last 2 years when i start practicing on private i may have studied over 300 articles(when on the contrary before that time interval i was not so keen on studying articles...)...almost every day i read something new, and u right that some of them maybe more valuable than just a single textbook...The only reason why i need an EXPERT book on biomechanics is to make quick references...Of course i do that easily when i check my articles-archive that i got...
But to be more specific the book from Giles and Singer was published in 1998-2000 and the one from Oliver and Middletich was republished in 2005...I can assume that maybe it more up-to-date, though it is just an speculation...