I bought both of these books at the same time because they were on the Kindle Best Seller list. Neither of the books is very expensive. Together, the cost of both books adds up to less than $2.
I'm just over 50 percent of the way through Lethal Experiment, and to its credit, it is better than the first novel, but only because the characters are familiar. There is more humor in the sequel, but the frequent gratuitous acts of violence toward women are just as annoying as they were in the first book. And, the female characters who aren't victims are objectified stereotypical representations of women.
Actually, all of the characters seem like shallow stereotypes to me. I guess, that is what the author was going for, exaggerated, cartoonish, pulp fiction-type personalities. Over-the-top characters can work if the plot is engaging enough, but this one did not work for me.
I think that the author probably had fun writing these two novels, and some readers seem to enjoy them. These books remind me of the paperbacks I used to read during our summer vacations in Minnesota when the only things to read at our cabin were old Reader's Digests and books that weren't good enough to be kept at home. They were not good, not bad, short on believability, and something to read.