https://martinbaileyphotography.com/product/sharp-shooter-proven-techniques-for-sharper-photographs-ebook/

Originally released as Martin’s second Craft & Vision eBook, Sharp Shooter – Proven Techniques for Sharper Photographs, is an exciting resource for photographers looking to discover new techniques and tools for making stunning images!
This 36-page PDF is a great addition to your digital library. Martin, in his usual clear and concise fashion, covers the gamut on the subject—from hand-holding techniques, stabilization, and what makes an image sharp in the first place, to macro-sharpness, depth of field, focus stacking, sharpening for final output, and more…