i bought his book awile ago (before i found MFK)...most of the info is good but, its only focused on asian aros (something i learned Jars is nothing like)...so i wouldnt recommend it to anyone that lives in the states or to someone who doesnt have an asian aro..
IMO: MFK has way more quality info on aros of all types..(not including every fresh water fish there is

)
i must add: Steven Yeoh is the ONLY reason i bought a 120gallon 4'x2'x2' tank...he claimed that this is the min. tank size for an aro!!! go figure

...shortly after that i found MFK and quickly found out this to be not true... so if you buy the e-book get it for the sweet asian aro pics! lol ...