I think this free for the first time on Ozbargain.
In today’s digital world, the more tech skills you have, the more valuable you are to your job, to your team, and to your clients. Knowing how to utilize programs like Microsoft Excel isn’t just helpful, in many cases, it’s mandatory. That’s where this book comes in. By offering exercises, illustrations, and step-by-step instructions for both Mac and Windows, this book can help any learner go from beginner to pro in no time!
I haven't read the last 5 I've got, but a freebie is a freebie ¦D