This is a boon for anybody who admires the Design Source Library books (many titles reviewed on this site) but lacks the space or funds to own them all. Just looking through them is enough to start the creative juices flowing, and at the front is a helpful list of themes covered, as well as a thumb-able reminder on the top of every page. As usual these designs are mainly fairly large, so if miniatures are your bag then this might be less useful than if you make waistcoats for example. From personal experience these detailed designs tend to enlarge better than they decrease, but as you are permitted to copy them, that means that the sizes can easily be altered. As ever, this is a useful and user-friendly resource for crafters.