Some of my photos turn black when I place them in my Book project. HELP!

With the amount of information you've provided it's impossible to offer a solution. We can't see your computer so we need to know the details of your problem and setup, i.e.:

• what system are you running?
• what version of iPhoto are you running?
• what fixes have you tried?
• where is your library located?
• did you apply any updates or upgrades just prior to the problem occurring?
• are you running a "managed" or "referenced" library?

• what type of Mac?
• how much free space on your boot drive?
• are you able to view the problem images full sized or edit them in iPhoto?

As a side note using a referenced library with iPhoto is not a good idea and is not recommended - see iPhoto and File Management - and may be the source of your problem

In Event view if you double click one of these photos does it enlarge correctly? If you click edit can you edit it? Any other clues?

LN

I'm running a referenced library

Are you able to edit in iPhoto any of the referenced photos? Also what happens when you try to view them full size in the library?

I'm in 100% agreement with Larry on referenced libraries. They only cause problems and are extremely sensitive to the availability of the source photos. If the source image files are not available at the time the library is opened the link to them can be broken. It's just not worth the risk of losing all of my organizational efforts to run a referenced library.

If you use the free version of iPhoto Library Manager you can consolidate the library into a new, managed library by rebuilding the library with iPLM.

How can I force an upload?

Try using Image Capture.