What novel did Joseph Heller write as a sequel to "Catch-22"?

"Closing Time" is a 1994 novel by Joseph Heller, written as a sequel to the popular "Catch-22". It takes place in New York City in the 1990's.

The book has two stories that are interwoven throughout – that of Yossarian in the last stages of his life, and that of Sammy Singer and Lew Rabinowitz. They are two men from Coney Island who also fought in World War II(the Sammy Singer character makes a brief appearance in "Catch-22" as the tailgunner aboard Yossarian's bomber who kept waking up and fainting when he saw Yossarian trying to attend to the wounds of Snowden).

As with "Catch-22", the topic of death is omnipresent, only in this case from (usually) age-related illnesses, in particular cancer (rather than dying in battle, as with its predecessor).

One notable inconsistency in the book is that although Yossarian was 28 in "Catch-22", which took place in 1944, in "Closing Time" Yossarian is 68, and the time of "Catch-22" is referred to as "50 years ago". When asked about the inconsistency in an interview with The New York Times, Heller replied, "I know, but I decided to ignore it."