10% off all books and free delivery over £50
Search Now
Login
Wishlists
Basket
Donate
New
Fiction
All Fiction
Action Adventure
Young Adult Fiction
Classic fiction: general and literary
Crime and Mystery
Dystopian and utopian fiction
Erotic Fiction
Espionage and spy thriller
Family Drama
Fantasy
Feel-Good Fiction
Festive Fiction
Fiction in translation
General Fiction
Historical Fiction
Horror and Supernatural Fiction
Humorous Fiction
LGBTQ+ Fiction
Literary Fiction
Modern and Contemporary Fiction
Political / Legal Thrillers
Quick Reads
Romance / Relationship Stories
Sagas
Science Fiction
Sharing Diverse Voices
Shorter Reads
Thriller and Suspense
Non-Fiction
All Non-Fiction Books
Biography and Autobiography
Business and Management
Cookery, Food and Drink
Gardening
Gift Books
Graphic novels, Comic books, Cartoons, Manga
Health & Fitness
History
Home and house maintenance
Humour
LGBTQ+ Non-Fiction
Lifestyle, Hobbies and Leisure
Mind and Body
Nature and the natural world: general interest
Parenting
Poetry
Popular Science
Self Help and Personal Development
Sports
Motoring
Travel
Highlights
Bestsellers
Star Books
Weekly Staff Picks
Fiction Books of the Month
Non-Fiction Books of the Month
Debuts of the Month
Audiobooks of the Month
LoveReading Top 10
Audiobooks
Ebooks
UK Top 10
Coming Soon
Book Club Recommendations
Liz Robinson's Picks of the Month
Books with an Author Interview
Book Awards
Collections
Giveaways
Special Editions
Indie Books
Features
All Features
Guest Editor, Vaseem Khan’s Spy Fiction for Readers Who Haven’t Tried Spy Fiction . . . yet!
Author of the Month: Adrian Tchaikovsky
On the Hunt for Spooky Stories and Haunting Tales - 80 of the Best Books for Halloween to Keep You up past the Witching Hour
William Hill Sports Book of the Year Award 2025 announces longlist
"Brilliantly human" Booker Prize 2025 Shortlist Announced
Dive Into our September Summary of This Month’s Bookish Adventures
Comedy Women In Print Prize Announces 2025 Shortlists
50 Fabulous Biographies & Autobiographies For Those Who Love a Book About a True Story
Author of the Month: Karen Swan
Best gifts for book lovers - presents that’ll put you in your loved-ones' (ahem) good books
21 Books Every Feminist Should Read
An Urgent Fight for the Wild in Modern Life as the Wainwright Prize Winners Are Announced
Looking for the perfect poems to celebrate National Poetry Day?
Bloody Scotland Authors Create Live Crime Story at 125mph
Children's
Work With Us
Our Purpose
Buy from our bookstore and 25% of the cover price will be given to a school of your choice to buy more books. *15% of eBooks.
Home
>
Positive Systems
>
Positive Systems (9783642028939)
>
All Editions
All Editions of Positive Systems By Rafael Bru, Sergio RomeroVivó
Positive Systems
Rafael Bru and 1 more
Paperback
Not Available
