Boston Organics, and a question

[magid]

Large box, one third fruit.

• two large sweet potatoes
  
• four small summer squash
  
• two medium artichokes
  
• four large white potatoes
  
• two ears of corn
  
• a bag of sugar snap peas
  
• a rooted basil plant (! plus, MA grown)
  
• a large eggplant
  
• four Roma tomatoes
  
• a quarter kilo of strawberries
  
• two small pink grapefruit (smaller than some of the oranges)
  
• two oranges
  
• five large blood oranges
  
• two peaches

And a dozen eggs. The peaches are pretty solid, and the tomatoes rather anemic; perhaps I shouldn't have put them back on the list yet.

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When you hear that there will be an author signing/reading, how much do you expect to pay (above and beyond the cover price)? Does this change if the touted book is a cookbook and there will be dishes available for sampling from the recipes?