Ran an eye over the plans before deleting my copy. Until I spotted the 2010 copyright, I assumed the book and the plans were old ones. There are quite a few mistakes in the WWI tanks. I think 3 examples will do; it will let everyone else have some nitpicking opportunities.
The Mark IV female has a Mark V style silencer.
The Mark IV Tadpole tank has dispensed with the roof hatch.
The Mark V male has the semaphore correctly placed in the profile view but then placed ahead of the rear cupola and reversed on the plan view.
I'll give this one a miss. The author states that the drawings "...are currently among the most precise and accurate AFV drawings available...". This may well be the case for the later vehicles but not the WWI tanks.