After being asked literally hundreds and hundreds of times. I wrote a practice book just for trumpet range and trumpet high notes. This is in many ways what Don Jacoby had us do to develop range and high notes when I studied with him.
Many people don't know HOW to go about practicing to increase trumpet range.
This shows you what to do and how much to do.
There are exercises and instructions that cover from Low F# to F over Double High C.
I have seen good players get tired on the first 2 pages and rest before going on. (These stop at high C but are written in an interesting way.)