Books on skydiving/wind tunnel flying

Hi,

first post on here. Im guessing that similar questions have been asked in the past, but does anyone know of any good recent books that focus on the 'freefall' element of skydiving. Or alternatively a book or any other reading material specifically about wind tunnel flying. Everything I've founds looks pretty dated. 

chers

Body-Flight Basics by Andy Newell.

Very well written and illustrated

Thanx,

Are these only in sale in UK?