Seeking a large number of illustrations for a book has been a very informative, but frustrating process. The lesson is simple. Not-for-profit journals published by scientific societies have in every single case given permission for use of the images from their publications, and of course, full attribution is given. For-profit journals have in every single case wanted payment for use of an image, even if the authors have given me permission. So the question is simple, do you want your research, your scholarship to be used or not? Of course, there is another tradeoff. Some of the most prestigious of scientific journals are for-profit publishers, and while it may indicate that your work is the latest and most important, and you may receive more notoriety for publishing in such venues, you work isn't going to be used as widely as you may wish. Now of course this is all because the publisher of my book is also an academic publisher and the budget for illustrations is basically nil, and no question about it, both the publisher and author hope the sales will result in some economic gain. So you begin to wonder what is fair usage?