A book with the title "selected papers" is bound to discourage readers of popular science, which is a shame as this book has a lot to offer to non-specialists (like me). Obviously, as a collection of papers, it can get quite dry and there are occasionally pages with maths (albeit quite simple, mainly fractions and equations with only 2-3 parameters), casual readers will probably skip them as I did.
The range of papers is quite wide and some are more traditionally 'scientific' than others, you have for example one on social insects full of evidence and testable predictions, and on the other hand one on self-deception which can sometimes come across as a philosophical opinion piece (or just common sense) expressed in scientific language. Finally, there are longish autobiographical introductions explaining how the author came to write the article, personal thoughts and criticisms, and a summary of developments on the topic after the article the written.
The 'more scientific' papers are very enjoyable, and full of interesting ideas, they may appeal to laymen who've read a few books on evolution or readers with little background to science (who can also get acquainted with the cold and lucid prose of academic papers. Unlike a lot of papers, the topics here are inviting and accessible).
The 'less scientific' pieces and especially the introductions are even more enjoyable. Trivers is too intelligent and self-aware to fall into the trap of verbosity and pseudoscience (in the case of the psychological pieces) or self-indulgence (in the autobiographical parts). Even in the most personal parts, he always engages with the world, puts his situation into a wider frame lucidly and un-emotively, and uses his experience to understand the world and provide insights on how science (and scientific mindsets) work, what it takes to do proper research and how humans and other animals are evolved to behave. The writing in the intros is also full of mischief, empathy, humour and quiet self-deprecation (And I should say that I rarely enjoy autobiographical parts).
Finally, for those not acquainted with Trivers' work, the theme in all the papers is conflict (within the individual, within family members etc), when it arises, and the practical cost/benefit to everything in life, it's all as far from escapism as reading can get, more than your average book on evolution.