Targeting Signaling Pathways in Solid Tumors, Part A, Volume 385 in the International Review of Cell and Molecular Biology series, highlights new advances in the field, with this new volume presenting interesting chapters on topics such as Drugging the Undruggable: Advances in Targeting KRAS Signaling in Solid Tumors, Emerging Trends in Gastrointestinal Cancers: Targeting Developmental Pathways in their Carcinogenesis and Tumor Progression, Importance of targeting various cell signaling pathways in solid cancers, Targeting signaling pathways in cancer stem cells: a potential approach for developing novel anticancer therapeutics, Factors affecting heterogeneity in breast cancer microenvironment: A narrative review, and much more. Additional sections cover Exploring TLR Signaling Pathways as Promising Targets in Cervical Cancer: The Road Less Travelled