I reviewed Ron Masa’s I Ching introduction at length here (part 1) and here (part 2). It’s a warm, genuine, clear and straightforward introduction; if you don’t need it yourself, you might consider buying it for a friend.
At the time of the review, this was only available as an audio; now, you can also get a downloadable ebook for $25, or the audio and ebook together for $35. There are generous audio and text excerpts for you to review here.