I should have never left it in there, and I should have had multiple copies and backups of every logbook page. I have a muscle memory to lock my truck when I get out, but I must've forgot. Once I was up and ready to go again, I found my flight bag was nowhere to be found (and thus my logbook). I have my Private and was working on Instrument. Does anyone have any knowledge or first hand experience with this and how to go about reconstructing it as best as possible? The only AOPA page I can find on it dates from 2000 and the FAA resource they point to is long taken down. I need to reconstruct my logbook as best I can. I could spend paragraphs going over how deeply I've looked for it, called around, etc, but I think it's time to start thinking about what to do if it really is gone. I've spent two weeks going through everything and everywhere, but I'm pretty sure my flight bag was stolen out of my truck while I was at work the morning before a flight.