Witness is 808 pages. Whittaker Chambers is the author. The book was published in 1952. It was about the Alger Hiss trial.
Dumb Witness has 320 pages.
Involuntary Witness has 274 pages.
The Only Witness has 118 pages.
Death of an Expert Witness has 368 pages.
Witness Against the Beast has 284 pages.
Witness - Karen Hesse novel - has 161 pages.
"Witness" by Karen Hesse is approximately 192 pages long.
Zach's Lie is by Roland Smith. The paperback has 224 pages. It is about a young man in witness protection because his father was arrested for drug trafficking.
A good place to find information on becoming an expert witness would be Seak website. However the are many other sites that offer more information like expert pages and expert communications.
Go read it. It's three pages.
There are probably several, you may need to check in your white pages.
Water Sleeps has 470 pages.