Book Unknown Filled

The book-unknown-filled icon represents a filled unknown or unclear book symbol, often used in educational or library contexts to signify uncertainty or ambiguity. This icon is part of the TDesign Icons library, specifically in the UI 24px category. The book-unknown-filled icon is used to convey a sense of uncertainty or unclear knowledge.

In software applications, the book-unknown-filled icon may appear in e-learning platforms, digital libraries, or note-taking apps. For instance, in an e-learning platform, the book-unknown-filled icon could indicate a course or tutorial that is not yet completed or is unclear.

From a UX perspective, the book-unknown-filled icon communicates a sense of uncertainty or unclear knowledge, helping users understand that they need to clarify or seek more information. This icon can be used to provide visual feedback to users, making it easier for them to navigate and understand complex educational content.

Book Unknown Filled is one of 2,138 icons in TDesign Icons, made by TDesign and released under MIT. It is drawn on a 24 × 24 grid.

Sign in (it's free), then open Get icon, Install with shadcn CLI, and pick your package manager to copy the command. It adds BookUnknownFilledIcon to components/icons/tdesign-book-unknown-filled.tsx: one file, a size prop (24 by default) and every SVG prop, with no icon package.

Copy it as React (from Get icon, or the Code section): a typed BookUnknownFilledIcon component you paste into your project, with no package to install. Only the icons you import reach your bundle. It works in Next.js and any React app.

Open Get icon, then Copy as code, and pick Vue, Svelte, Angular, Solid or Preact; the Code section shows each one too. Every version is one self-contained component with the SVG inside, and SVG and data URL copies are there for plain HTML and CSS.

With Pro, the shadcn.io MCP server lets Claude Code, Cursor or any MCP client find the Book Unknown Filled icon, or any of 2,138 TDesign Icons icons, and install it from a prompt.

It's drawn in currentColor, so it takes the text color wherever you use it: a class like text-primary recolors it. To bake a color in, set one in Customize before you copy.

Set width and height on the component, or a class like size-6. It's drawn on a 24 × 24 grid, so it stays sharp at any size. Customize also sets the size it exports at, its padding and rotation.

Yes. It follows the text color, so with text-foreground (or any theme token) it changes with your light and dark themes. The icon is a vector, so it needs no separate dark asset.

Next to a visible label it's decoration: add aria-hidden="true" so screen readers skip it. Standing alone, as in an icon button, give the button a name instead, like aria-label="Book Unknown Filled", so screen readers say what it does.

Yes. BookUnknownFilledIcon passes every SVG prop to the svg element, so <BookUnknownFilledIcon aria-hidden="true" /> works, and so do role="img" with aria-label, or a title child, when it carries meaning on its own.

Yes. Open Get icon, then Download file: SVG for code or design tools like Figma; PNG, WebP or JPEG at 512px; or an ICO favicon with 16, 32 and 48px inside. Each one uses what you set in Customize.

Yes. MIT allows commercial use; keep the license notice when you ship the icons' source files. The full terms are in the license, linked on this page.

No visible credit is required: MIT only asks that you keep the license notice if you ship the icons' source files. Icons installed with the shadcn CLI already start with a comment naming TDesign Icons, TDesign and the license.

Yes. Copying and downloading it is free, and the shadcn CLI install only needs a free account.

Its tags are UI, symbol, element, indicator, education and learning. Each tag page lists the icons that carry it from every library, which is the quickest way to find a match for Book Unknown Filled in another set.

TDesign Icons draws many icons in several styles: Filled next to the default. Open the library and pick a style above the grid to see Book Unknown Filled's siblings in it.