19) A Child Called Noah by Josh Greenfeld
20) A Client Called Noah by Josh Greenfeld
21) A Place For Noah by Josh Greenfeld
22) Boy Alone by Karl Greenfeld

23) Pandemic by Daniel Kalla
24) Resistance by Daniel Kalla
25) The Last Prophecy by John Land

I read A Child Called Noah and A Client Called Noah back in the 1980's. I saw a review of the brother's book Boy Alone and decided to reread the entire series. True story of a boy named Noah with autism and the family's research and work to attempt to cure him. Noah is now in his 40's and remains profoundly handicapped. Interesting but sad.

Pandemic and Resistance are medical thrillers.

The Last Prophecy is a thriller ranging from WWII to the present.