Hive Inspection Basics for Northwest Beekeepers, by John Edwards. This can be purchased as an E-Book where it will come as a PDF file. It is 75 pages long and features extensive instruction on external and internal hive inspections, with many photos and diagrams to go with it.
This is an E-book and you will not receive a physical copy. If you do not receive notification of the PDF, it might be in your spam folder. Please reach out if you have any issues.