Found this practical tip in a church bulletin….
When reading books on Orthodoxy, writings of the Fathers, lives of Saints, and the like, it is often (not always, by any means) a good idea to skip the Introduction! Be particularly wary of it if it is long. There seems to be a fashion for giving books introductions which are intended to give a certain slant to the main text which follows. Such slants are best avoided, and it is preferable to simply let the text speak for itself. As a precaution, at least always read the text before reading the introduction.