Of course, I hope you might consider reading Viking Funeral (coming soon), but my agnostic dark humor and potty mouth may not be for you; I completely understand. There are infinite ways to grieve. I have curated a list of other books that you may find helpful. Read the reviews on Amazon for yourself to determine if the suggestion resonates with you; as again, infinite ways to grieve.
The Five Invitations: Discovering What Death Can Teach Us About Living Fully
by Frank Ostaseski
The Beauty of What Remains
by Steve Leder
On Grief and Grieving: Finding the Meaning of Grief Through the Five Stages of Loss
By Elizabeth Kubler-Ross and David Kessler