This User Manual icon is a responsive icon. This means that it's optimized for four resolutions, from tiny 16x16 until highly detailed 80x80. The style comes from the latest Microsoft Office, which makes it perfect for any Windows applications, in particular, those with ribbon toolbar control. Unlike other icon packs that have merely hundreds of icons, this monster icon pack contains 15,700 icons, all in the same style and quality.
This icon for User Manual looks like an open book. The cover of the book looks like a rectangle with rounded edges, and two pages are visible, separated by a line in the middle of the pages. On the page on the right, there is a large lower case letter i.