This week in apps features the comprehensive troubleshooting guide Boatowner's Mechanical and Electrical Manual. Also this week is Mysterious Benedict Society, an app for kids and adults that will test your wits. Also, Marcel the Shell with Shoes On: Things About Me, tells the tale of the shell with feet that lives in a piece of bread. Next, there's Tacky the Emperor, the story of the penguin without a fashion sense, who makes quite the impression when the emperor comes to visit. Finally, there's A Duck in New York City, which follows a prairie duck coming to the big city.

Title: Boatowner's Mechanical and Electrical Manual

Publisher: Mobile Systems

Release date: October 21, 2011

Price: $49.99

Background: This troubleshooting guide teaches you how to maintain, repair, and improve your boat's essential systems.

Features: Comprehensive advice on topics such as battery technologies, 12- and 24-volt DC systems, corrosion, bonding, and lightning protection, generators, inverters, battery chargers, electric motors and electric lights, maring electronics, antennas, RFI, diesel engines, transmissions, shaft brakes, propellers, refrigeration and air-conditioning, tanks, plumbing, through-hulls, pumps and watermakers, steering, autopilots, wind vanes, stoves and heaters, winches, windlasses, bow thrusters, spars, rigging and roller reefing.

Title: Mysterious Benedict Society

Publisher: Little, Brown

Release date: November 7, 2011

Price: Free

Background: Kids and adults can test their wits and see if they have what it takes to join the Mysterious Benedict Society. The app is based on the bestselling book series by Trenton Lee.

Features: Solve brainteasers in categories like Perplexing Puzzles, Elusive Enigmas and Curious Conundrums, and then complete your official certificate.

Title: Marcel the Shell with Shoes On: Things About Me

Publisher: Penguin

Release date: November 3, 2011

Price: $6.99

Background: Marcel is a shell with shoes and a face and players can discover his world in a tale narrated by Jenny Slate as the voice of Marcel. Players explore Marcel's world, which includes his breadroom (he sleeps in a piece of bread) and a whirling salad spinner.

Features: Players can tilt the screen to pilot Marcel's parachute and scroll to meet his pet Alan.

Title: Tacky and the Emperor

Publisher: Oceanhouse Media

Release date: November 9, 2011

Price: $1.99

Background: Tacky doesn't have the best fashion sense, but when the emperor arrives, he gets carried away in his attire. Players follow his story upon the empror's visit.

Features: Professional narration, background audio, enlarged artwork, read to me, read it myself and auto play modes, picture/word association, pages pan and zoom to accentuate the artwork.

Title: A Duck in New York City

Publisher: The Secret Mountain (Les Productions Folle Avoine Inc)

Release date: September 30, 2011

Price: $3.99

Background: A story of an adventurous duck from the prairie. He sets off to New York City to fulfill his big dream of doing his ducky dance on Broadway. He overcomes failure with the encouragement of his new friend, Big Betty. This app is based on the storybook-music CD of the same title, written by Connie Kaldor.

Features: Five features allow you to either read, listen or watch animated version of the narrated story; listen to the theme song, or sing the theme song in karaoke.