Sinister Heights : [an Amos Walker novel]

"Detroit private eye Amos Walker is hired by the young widow of an industrialist to find her late husband's illegitamate child. What Walker finds is an abused wife on the run with her young son."
"After the death of centenarian Leland Stutch, creator of an automobile dynasty, his young widow hires Amos Walker to find Leland's mistresses and illegitimate children in order to share the wealth, but Walker's investigation has unexpected repercussions."@en
"After the death of centenarian Leland Stutch, creator of an automobile dynasty, his young widow, Rayellen Stutch, hires Amos Walker to find the various mistresses and illegitimate children that Leland had throughout his long life in order to share the wealth, but Walker's investigation soon uncovers some dangerous secrets and has unexpected repercussions."@en