I am rereading the books at the moment. Over the past 2 weeks I have visited 3 homesites (Pepin, WG and De Smet) so I thought that I wouold read them again. I read LHBW in a few hours. I decided to skip FB and LHOP because I have read them recently with a group of online friends and am now reading OBPC.
You will never be too old to read these books, they are timeless and never grow old.