We've mentioned the following resources so far:
But there are also these:
- The old-skool LFE User Guide
- Example code in the LFE repository
- The lfex org - Community-contributed libraries
- The lfe org - Core code, tools, and on-line resources (docs, blog, etc.)
True mastery of LFE is not matter of syntax, though: it requires a deep knowledge of Erlang/OTP and how to best apply that knowledge. The Erlang site has links to great Erlang books you can read.