He did indeed run out of time but while alive put out a staggering amount of work. It was very sad that healthcare in the USA costs so much but I am certain people contributed hugely toward the cost of his care (lets not forget that when his lab was raided and he was forced to give back his research license a well as being fined $25,000, request for funds was put out and $40,000 was raised in 6 days……).
The only book I know was being actively worked on was the Shulgin Index volume 2, the extended chemistry from TIHKAL. Whether that will ever see the light of dy though is anyone’s guess.