Book something you'd burn with job writing on-line (8)

'book something you'd burn' is the definition.
I know nothing about this answer so I can't judge whether it can be defined by this definition.

'with job writing on-line' is the wordplay.
'with' means one lot of letters go next to another.
'job writing on' becomes 'blog' (I can't justify this - if you can you should believe this answer much more).
'line' becomes 'post' (post is a kind of line).
'blog' next to 'post' is 'BLOGPOST'.

Can you help me to learn more?