# Varnish book Transparent CDN is based on [Varnish Enterprise](https://www.varnish-software.com/), and as such, you can enjoy almost everything you can do with the Enterprise version of Varnish, but with the added advantage of it being offered as a service, reducing the cost of ownership. Below, we provide the link to download the Varnish Book, so you can understand the power that Transparent CDN and Varnish Enterprise offer you. However, please note that being a platform as a service, we do have some [limitations](/config/vcl/limitaciones.md). {% file src="/files/-M8yVf8oT-8m33lqHPF-" %} Varnish Book {% endfile %} --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.transparentedge.eu/config/vcl/varnish-book.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.