I wrote that book so my opinion will be biased but I was also frustrated by the number of references I needed on hand, especially for halfpenny varieties. If you go to https://www.commonwealthcoins.net/book/british-fractional-bronze there's a link to a .pdf of the farthing section only if you want to get an idea of what it's like.
Major differences to Freeman are that I consider Victoria obverses 11 and 12 the same (I looked at many photos and it looked like both obverses exhibited similar features, not to mention that some published diagnostics are contradictory) and the George VI varieties get some proper coverage.
Any feedback, please send it my way.