Life insurance inheritances go directly to the beneficiaries who are named on the policies. They typically don't become part of the decedent's probate estate.
Books
Couch on Insurance 3rd by Steven Plitt and Joshua Rogers
Call Number: KF 1159.5 .C68
Life & Health Insurance by Franklin Best, Jr.
Call Number: KF 1175 .B37
New Appleman on Insurance by LexisNexis
Call Number: KF 1164 .A6
Also available as an ebook from the Franklin County Law Library's website for Central Ohio attorneys with a Franklin County Law Library library card.
Couch on Insurance 3rd by 
Life & Health Insurance by 
New Appleman on Insurance by