The Biology Book by Michael C. Gerald and Gloria E. Gerald (2015, ISBN 978-1-4549-1068-8).
Subtitled: From the Origin of Life to Epigenetics 250 Milestones in the History of Biology.

250 topics, each gets one page of text and a picture. Seems like a good overview of Biology, but for the non-technical reader.

Purchased in December 2016 at Powell's books for 29.95$.