Although Ben Bova is one of the Greats of science fiction, this is not a science fiction novel. I wouldn't exactly call it a "thriller," either, since the biggest weapon involved is an animal tranquilizer dart. In terms of genre, "medical fiction" seems to come closest. The novel is really a drama about the issue of animal and human experimentation in medical research, where morality, science, business, politics, and religion collide.
The protagonists are two brothers, one a physician and the other a commercial research lab director, who find themselves on opposite sides of the issues as the lab races to develop a method of growing replacement human organs. Conflict between the brothers is heightened by a love triangle that is intricately woven into the well-plotted story. The climax of the plot is a "science court" to try the issue, an idea that has been mooted for several years now in the science policy community, and whose pros and cons are illustrated here in fictional form.
Bova makes no secret where his sympathies lie; he is 100% pro-science, to the extent that readers who feel strongly about animal rights may actually dislike the book. One of the characters in the book is a thinly-disguised send-up of Jeremy Rifkin, the anti-technology activist; other satirized characters include venal politicians and anti-stem-cell-research preachers.
There are enough plot reversals and personal conflicts to keep the book interesting and well-paced throughout. The heros are given enough flaws to make them seem like real people, warts and all, and the science, politics, and business issues are worked out in a pretty realistic fashion. People who enjoy reading issue-oriented fiction may like to give this one a try.