go.dev/layouts/partials/learn/book.html

<div class="Book">
  <a href="{{.url}}" target="_blank">
    <div class="Book-inner">
      {{if .thumbnail}}
      <div class="Book-thumbnail">
        <img alt="{{.title}} thumbnail." src="{{.thumbnail}}" />
      </div>
      {{end}}
      <div class="Book-content">
        <p class="Book-title">{{.title}}</p>
        <p class="Book-description">{{.description}}</p>
        <div class="Book-cta">
          <span>{{.cta}}</span>
          <svg
            xmlns="http://www.w3.org/2000/svg"
            width="16"
            height="16"
            fill="none"
            viewBox="0 0 24 24"
          >
            <path
              fill="#007D9C"
              fill-rule="evenodd"
              d="M5 5v14h14v-7h2v7a2 2 0 01-2 2H5a2 2 0 01-2-2V5c0-1.1.9-2 2-2h7v2H5zm9 0V3h7v7h-2V6.4l-9.8 9.8-1.4-1.4L17.6 5H14z"
              clip-rule="evenodd"
            />
          </svg>
        </div>
      </div>
    </div>
  </a>
</div>