Propagation Ebook

Several years ago G0YKA & G3NYK wrote a series of monthly articles for the RSGB, They have consolidated these monthly articles into a single volume available in .pdf form. This ebook is available free on G0YKA's blog:

Understanding LF and HF Propagation

What makes this ebook so interesting is that it takes a month by month and band by band approach to propagation...