### Context Some books would like to use `&` in the titles. For example, we have removed this usage in [651674e](https://github.com/QuantEcon/lecture-tools-techniques/pull/2/commits/651674ee82565def1767866b2041d1c5c670bf83) to allow for compatibility with LaTeX / PDF. ### Proposal Enable support for the `&` character in titles and text by updating title text to escape the character in LaTeX/TeX ### Tasks and updates _No response_