Google Sheets Email Marketing - Email automation and validations directly from Google Sheets
GrowthHackList - 100+ curated growth hacks for makers + early stage startups
SaaS Email Marketing Handbook - Double Your MRR With Email Marketing
Growth Hacker Marketing - Ryan Holiday's book, re-released and expanded
Elevatr Email Marketing Automation - Fast and easy email marketing software
Ryan Holiday - We Invest $500k in Sci-Fi Founders.