Book positioning: the sentence every channel repeats
Positioning is the sentence that survives being shouted across a noisy room: who the book is for and what changes for them. “A productivity book” dies; “a planning system for freelancers juggling four clients” travels. Write the sentence before designing a single asset, test it on five real target readers, and then refuse to vary it per channel — repetition is the feature, not the bug.
Every downstream asset — description, ads, podcast pitch, email subject — is that sentence wearing different clothes.