Great tip: soil test!
Was it either of these?
Fundamentals of Turfgrass Management https://www.amazon.com/dp/1119204631/ref=cm_sw_r_cp_api_glt_fabc_9FYMQZRM06C6QYDNM9Q8
Turfgrass Science and Management https://www.amazon.com/dp/1111542570/ref=cm_sw_r_cp_api_glt_fabc_EP7PXYEKWAWHWF5WYJM9
No, I was wrong. It's 480 pages. And that's just the fundamentals of turf care.