You absolutely must have a copy of this book as bathroom reading.
This I learned from using the bathroom at my grandparent's as far back as the mid to late 80s.
https://smile.amazon.com/dp/B000URBS54/ref=cm_sw_r_cp_apa_glc_fabc_EZCN47ARZN5PJSQ8F560
This was bathroom reading at my grandparent's house in the 80s and 90s.
https://smile.amazon.com/dp/B000URBS54/ref=cm_sw_r_cp_apa_i_ZXFiFb6736KE2