Operation Chaos by Poul Anderson;
The Day After Judgment by James Blish;
Midsummer Century by Blish;
The Triumph Of Time by Blish.
It is noticeable that each of these works is part of a greater whole.
Operation Chaos, a collection and novelization of four "Operation..." stories, has a sequel, Operation Luna;
these two volumes plus two other novels and two short stories form a multiversal sequence.
The Day After Judgment is the sequel to Black Easter;
these two works are Volumes IIa and IIb of Blish's After Such Knowledge Trilogy.
Midsummer Century is connected by a Dirac message to The Quincunx Of Time, a novelization of "Beep";
After Such Knowledge, Volume III, A Case Of Conscience, and The Quincunx Of Time are two of five novels which, together with three short stories, form Blish's non-linear Haertel Scholium.
The Triumph Of Time is Volume IV of Blish's Cities In Flight Tetralogy;
the Dirac transmitter also figures prominently in Cities In Flight.
Thus, I recommend not only the four individual works but also:
the multiversal sequence;
After Such Knowledge;
the Haertel Scholium;
Cities In Flight.
It is now time to look at what Operation Chaos says about survival after death.