The first impression you get when reading the first chapters is that this novel is just a literary exercise, done only to tone up the abs of the mind.
Regardless of the aforementioned fact, it is a quite interesting novel.
The main plot and effort is to continue/start a story of Dr. Moreau's Island in a sort of degenerated proto-society composed by Dr. Moreau's experiments descendents.
In this universe the Island was real and Wells wrote not a novel about it, but a report. In the midst of an escalating World War it was rediscovered and passed along some nations hands. By the time of the story, the United States of America owns the Island and has decided to recreate partially Dr. Moreau investigation.
To say more, it would ruin the novel.
The characters all have something wrong with them, the current researcher is seriously deformed, Heather has a twisted view of the world, and some of the animals/men are really preverse and evil.
This book is just one of the reused classical sfish novels, like "Frakenstein Unbound", that Aldiss wrote to expand his bibliography and entertain many people.
Recommend the novel.
Enjoy the book and till next time,
M.I.T.H. (ManInsideTheHelm)