OK, it looks like MS Word was used to create the About the Book page, which is why it looks different. If you want the page to have the same look as the rest of the site, you should copy plain text into the WordPress editor and not formatted text, and then apply the paragraph type using the drop-down to select either Paragraph, Heading 1, etc, and to create your bullet lists.
The About the Author page was also created using Word, but the font that was used matches the TwentyThirteen default font better, which is why there’s not so much of a difference in appearance. However, I would still copy & paste in just plain text to get rid of the MS Word formatting that is embedded.
The reason why the text isn’t flowing around the picture is that a CSS float: left; rule should be applied to the picture. If you insert an image using the Add Media button in the page editor, the alignment options that you can select are Left, Right, Center, or None. Selecting Left will add the necessary CSS styling to the image. Otherwise, you can add the necessary CSS styling inline to the <img> tag.
The bottom line is don’t use Word to format how you want the page to look, just add plain text and use CSS to style the appearance for the overall site. If you don’t know about CSS, you can read a tutorial here.