About: http://webisa.webdatacommons.org/85793188

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	The 21 days part is decieving: you could only devour the book and do all its exercises in 21 days if you did nothing else except sleep and eat.
http://www.w3.org/ns/prov#wasQuotedFrom	perlmonks.org