Hi Liam. Delighted to hear about your read-through party!
CWs for arachnophobia, any kind of insect-related phobia in general may trigger entomophobia in any who experience it generally.
Frequent, FREQUENT mention of decomposition and viscera.
If you would like a specific list of riggers and corresponding page-numbers, it may take me a weekend or two but I can make one upon request.