The book takes you into the intersection of jQuery with CSS to do simple web page programming. The cited examples are what you might be likely to need. Like customising scrollbars, or upgrading a FAQ page. But it is later into the book that the examples get a little more intricate and possibly challenging. Take the desire to show a picture in a lightbox. The latter, in case you are not familiar with the term, is a temporary popup-type window that can appear when you click or hover on a thumbnail image. The lightbox shows the full image from which the thumbnail was generated. The chapter then goes a step further, by showing how you can code to put a video in a lightbox. Not bad; a natural progression from just showing a static picture.
The book continues along this line by offering a chapter on putting content into sliders and carousels. The latter is basically a ring buffer of (usually) thumbnails, with control arrows at the left and right ends. Pressing one of those arrows moves the view of the buffer in that direction. You have undoubtedly seen webpages with this, and the text reveals that doing this using jQuery is also easy.
Another merit of the book is the extensive use of HTML5. Though you can't really tell this by looking at the front or back covers. If you have also been curious about what HTML5 can do for your website, the book can function as a de facto collection of examples.