What This Actually Is
Letters To Penthouse has been around since the 60s. It started as a magazine format where readers wrote in letters that got published along with editorial responses. The "Backdoor Adventures" tag on volume 51 doesn't mean much beyond being a thematic label for that particular issue. It's erotica-adjacent magazine content, nothing more. If you're looking for this specifically, you won't find it on any major retailer's new release list. Volume 51 is out of print now. Most copies sitting around are from the mid-to-late 2000s era. I've seen it listed on eBay anywhere from $3 to $15 depending on condition, but the shipping costs usually eat up half that value so it's not worth chasing unless you need a specific issue. The backdoor adventures theme was fairly common in Penthouse's later runs. They'd run themed letters columns where correspondence about particular topics got collected and published. Nothing groundbreaking. The writing quality ranges from actually interesting to painfully generic depending on who wrote in that month.
I ran into a problem once trying to track down the exact publication date for volume 51 because different sources listed different months. The workaround was going straight to the ISSN records through the Library of Congress database. That settled it at around 2006. Sometimes the simplest answer is just primary documentation instead of trusting whatever random blog has a scanned cover image. One thing people miss when they're digging through old Penthouse material is the difference between the main magazine and the letters column. They were separate departments. The editors sometimes republished letters from earlier issues in later volumes under different themes. If you see a letter that feels familiar, it probably appeared before. The editorial team recycled content more often than most collectors realize. Another nuance: Penthouse had regional editions. What came out as volume 51 in the US might be a different volume number in the UK or German editions. If you're searching internationally, make sure you know which edition you're actually after. I spent weeks thinking I had the wrong issue once because I ordered a UK reprint without realizing it had different cover art and a few exclusive letters mixed in.
The real value in these volumes isn't the headline content. It's the letters section because you get actual correspondence from real readers during that time period. Sometimes the editorial responses reveal more about the culture of the place than the fiction pieces do. That's where the interesting stuff lives if you're researching anything social or cultural from that era. Downloading these is straightforward if you know where to look. Archive.org has some issues scanned. The Internet Archive search works fine if you type in the full title with the volume number. You'll find digitized copies uploaded by individual collectors. Quality varies from readable to barely legible depending on whoever scanned it and what printer they used. Paper copies still circulate on marketplaces but check the actual photos of the spine and pages before buying. Some sellers glue together multiple issues and sell them as one lot. I've been offered three volumes bound together and told it was a single rare edition. Just send them a message asking for a photo of the copyright page before committing.
Get the Full Details
If you're looking for something more current, Penthouse has shifted significantly over the years. The letters column format they ran for decades got trimmed down as the magazine changed direction. Volume 51 sits in that period where they were still doing fairly traditional content before everything moved more toward digital and video. Knowing where it falls in that timeline helps set expectations for what you're actually getting. There's no official download link because Penthouse doesn't host a digital archive of these volumes. Anything claiming to be an official source is probably a repackaged scan someone uploaded without permission. That's fine if you just want to read it, but don't expect customer support or guaranteed quality from those uploads. I've found that the most reliable copies come from people who actually collected these when they were current. Buy from collectors on forums rather than generic resellers. The condition descriptions are more accurate and the prices tend to be fair because the seller actually knows what they have.
Another edge case: some volume 51 copies have additional insert magazines or promotional materials bundled in. These aren't always reflected in the listing. If the description doesn't mention extras and the price seems low, ask. I once got a copy with three bonus booklets inside that the seller had missed entirely. Worth noting for anyone collecting complete sets. The content itself is standard for the genre. Personal stories, fictionalized accounts, and advice column style responses. If you grew up reading Penthouse in the 90s or early 2000s you already know the tone. It's polished but not particularly deep. The backdoor adventures theme just means certain topics got more coverage in that issue. If you can't find volume 51 specifically, the surrounding volumes (50 and 52) cover roughly the same period and often have similar editorial direction. Sometimes it's easier to grab one of those and cross-reference rather than hunting down a single number.
Library copies exist too. University libraries with media collections sometimes have complete runs. I've used interlibrary loan for single issues before and it took about two weeks. Not ideal if you need it now, but free if you can wait. The biggest frustration people have with these older volumes is figuring out which letters are real versus which ones were written by staff or paid contributors. Penthouse did use ghostwriters for the letters section occasionally, especially for more dramatic or unusual stories. There's no official list of which letters are authentic, which makes some researchers uncomfortable. You just have to read critically and decide for yourself what feels genuine. I keep a folder of scanned covers from each volume I own. It sounds silly but it helps when you're trying to verify which issue you're looking at across different sources. Covers changed design styles several times during the Penthouse run and knowing which visual style corresponds to which era saves a lot of time when searching online.
Nothing else really needs to be said about this. It's a magazine from a specific time. Find what you need, read it, move on.
