In one of her first headshots, Jenna Fischer looks like a chipper teenager in overalls. In another, she has a seductive gaze and a gaping, spaghetti-strap top.

Although the aspiring young actress liked the "fierce, sexy girl" picture, it didn't lead to many jobs. Problem was, it wasn't really her.

Finally, she figured out what she was selling: "sweet, trustworthy, open, cute, and vulnerable." In other words, an actress who was more like her, a 20-something Missourian who graduated from a Catholic High School and state university.

When she found a photographer who could convey that image, it helped lead to her first big job: nice receptionist Pam Beesly in "The Office," Fischer writes in "The Actor's Life: A Survivor's Guide."

"I know what you might be thinking: 'I can play anything! I'm a trained actor!'" she writes. "But acting in the entertainment business is about typecasting and gut reactions, especially when you are starting out. If you look naturally sweet and naive in real life, you aren't going to be cast as a drug-addicted career criminal. ... At least not at first."

That frank talk and advice make up much of "The Actor's Life," along with many personal examples and stories from other actors. Fischer talked by phone from Los Angeles about her book, her own missteps and whether she has had to navigate any of the harassment issues that have plagued Hollywood.

The missteps are probably the most fun for the average reader who wouldn't dream of running off to Los Angeles and living in a hovel while eating "actor's pizza" (piece of bread, two packets of ketchup and a slice of American cheese). She admits to defaulting on credit cards and eating "untouched" food from cleared plates while working as a restaurant server.

But Fischer says her book really is for aspiring actors and is not a memoir. "It's the guidebook I wish I'd had when I started down the path of being an actor," she says.

Some of the messages are also appropriate to other artistic pursuits, she says, or anyone "striving for a particular goal. There's a lot of general encouragement in the book about not giving up." It also should be of interest to parents of creative kids who may have their own tough climb or to people just generally curious about actors' lives.

Fischer wanted to go in-depth about steps she couldn't find in other books.

"I spent seven years on the book from the time I had the idea," she says. "I had been speaking to acting classes for many years for free. Most of those talks regarded fielding questions."

So she started recording the sessions, which helped define what actors wanted to know. By telling them some of her own stories, she had a ready supply of examples.

What students often asked was "how do I get an agent?" and "how do I persevere through rejection?" So Fischer goes into those things, including telling them that most new actors aren't ready to get an agent.

"You need to do a lot of work on your own before you're really ready for an agent to take you on," she says. Getting an agent isn't addressed until Chapter 3.

Much of the introduction and Chapter 1 is about how she did not grow up in a showbiz family: "My parents weren't actors or musicians or writers. My father was a plastics engineer and my mother was a school teacher. Both are now retired, but they both loved what they did."

Anne and Jim Fischer's examples rubbed off on little Jenna, she writes: "From a very young age, I inherently knew I had to follow my bliss."

But while she auditioned for school plays at Nerinx Hall High School in Webster Groves, Mo., "they mostly ended in failure," she writes, then proving it with four blurry pictures of her as a barely recognizable chorus girl or the guy with a violin in "Fiddler on the Roof."

"Of course in hindsight, my old theater teachers are happy to discuss my 'obvious' talent from a young age," she writes. "I'm still close to many of them and I find it hilarious when they tell me how they 'saw something in me.' Yes, you saw me in the dance chorus!"

She also didn't attend Juilliard or Yale's drama school. She went to "a tiny liberal arts college called Truman State University in Kirksville, Missouri," she writes. And she seems to have loved it. "I got a great education, and I didn't leave school with a giant debt."

Along the way, Fischer has faced sexual harassment. But it wasn't in the entertainment industry. She was working as a receptionist and had to file a claim against a co-worker ("I think that comes from my feisty Nerinx Hall-powered education," she says. "I report things. We don't like to be quiet about things that seem unfair or unjust.")

"I've had close calls. Like accepting an audition at an apartment and then learning you should never do that."