Of which usage

hi~

"He has written a book of which I've forgotten the name."

Is the next sentence also correct, expressing the same idea ?
(Because I think I might have heard of this...)

"He has written a book of which the name I've forgotten."

The original sentence is from Swan's book and the reason I'm asking is that the writer didn't include the inquired sentence among those he listed as having the same meaning.

Those are...
He's written a book whose name I've forgotten.
He's written a book the name of which I've forgotten.
He's written a book that I've forgotten the name of.
He's written a book of which I've forgotten the name.

Thanks!