Ignore the attention-grabbing title,
This review is from: Who Murdered Chaucer?: A Medieval Mystery (Hardcover)
There's a convention nowadays that the past can only be explored via a journey to solve some unexplained "mystery", in this case the unrecorded death of Geoffrey Chaucer.
Thus the dodgy premise that Chaucer was murdered distorts what is otherwise a fascinating account of a dark period in English history, as a sort of "Prague spring" of free thinking and creativity was overtaken by repression and tyranny under the usurping Henry IV.
As for Chaucer's "murder" it seems unlikely that Chaucer's friends and admirers on the Continent would have ignored such an outrage, or that the authorities would have seen the need for stealth. More likely that Chaucer, as was his wont, quietly withdraw from public life when the heat got too much and passed away from natural causes.