This is a free, online textbook. However, according to the site, "By agreement with the publisher, this book is accessible by the search feature, but cannot be browsed." One can easily browse it, as the chapter titles are included: #1 The Dynamic Cell, # 2 Chemical Foundations , # 3 Protein Structure and Function, 4 Nucleic Acids, the Genetic Code, and the Synthesis of Macromolecules, # 5 Biomembranes and the Subcellular Organization of Eukaryotic Cells, # 6 Manipulating Cells and Viruses in Culture, # 7 Recombinant DNA and Genomics, # 8 Genetic Analysis in Cell Biology, # 9 Molecular Structure of Genes and Chromosomes , # 10 Regulation of Transcription Initiation, # 11 RNA Processing, Nuclear Transport, and Post-Transcriptional Control ,# 12 DNA Replication, Repair, and Recombination, # 13 Regulation of the Eukaryotic Cell Cycle, # 14 Gene Control in Development, # 15 Transport across Cell Membranes, # 16 Cellular Energetics: Glycolysis, Aerobic Oxidation, and Photosynthesis, # 17 Protein Sorting: Organelle Biogenesis and Protein Secretion, 18 Cell Motility and Shape I: Microfilaments, # 19 Cell Motility and Shape II: Microtubules and Intermediate Filaments, # 20 Cell-to-Cell Signaling: Hormones and Receptors, # 21 Nerve Cells, # 22 Integrating Cells into Tissues, # 23 Cell Interactions in Development, and # 24 Cancer