To register, open the New registration page and fill in the required fields. After completing registration, you will receive registration confirmation by email.

Yes, you can change the registration information anytime you want. To do so, log in on one of the LIDEL Group websites and in your account, access the Edit Data page. You will be forwarded to LIDEL's website, where you can change your information.

If you forget your password, go to the Login page and enter your email in the appropriate section ('Forgot your password?') so we can send you an email for retrieving your password.

When you register on the LIDEL Group websites, you have the possibility to subscribe our newsletter. As an alternative, you can enter your email in the Newsletter section on the left-hand side of the LIDEL Group website pages.

The LIDEL Group newsletter is sent once a month. Occasionally, you may also receive newsletters with promotions and other special campaigns.

Additional materials and audio files are available for download on the respective book's pages. As an alternative, you can download the additional materials of your book on the  Downloads page, where you need to enter the ISBN and answer a few questions.

The back cover is the back part of a book, which typically features the presentation text (blurb) of the book as well as the barcode and the publication's ISBN code.

If you cannot find the additional material and audio files that you are looking for on the Downloads page, the material probably refers to a book that is no longer available for sale. If your book is old or out of print, the additional materials will no longer be available.

You can leave your order whenever you want, provided you haven't completed payment yet. You may add and remove items to/from your Cart and resume the ordering process. Any items that you have already added to your 'Shopping Cart' will remain in the Cart.

A product stating 'Subject to Confirmation' means that the stock is limited. If your order cannot be completed by the estimated due date, or if it cannot be completed altogether, you will be notified by email within two working days.

If it isn't possible to deliver an order that has already been paid for fully or in part, the value of the undelivered product will be refunded within 15 days at the most. You may opt for receiving the amount through a shopping voucher to be used on one of our websites, or by bank transfer to your IBAN account.

You can choose between the following payment methods: credit card, ATM or Bank Transfer. Orders placed using the ATM and Bank Transfer methods will be valid for a period of 15 days. If no payment is received within that period of time, the order will be cancelled.

As soon as you complete your order, you will receive a confirmation email with the description and quantity of all ordered products, your billing and delivery details and the amount to be paid. You should keep this message until you receive your order, as it is your proof that the order was placed successfully.

If you cannot complete your order, you may finish it at a later time. After logging in on one of the LIDEL Group websites, your 'Shopping Cart' will show a list of any products you may have added previously.

After moving on to your 'Shopping Cart', you will be prompted to enter your voucher code. The voucher amount will be deducted from the total of your order. You can only use one voucher per order.

Percentage vouchers represent a percentage discount that will be applied to your order. This discount may not be combined with any other discount, so if there is a promotion, the website will choose the most advantageous situation for you.

Fixed-value vouchers represent a sum of money that will be deducted from your order. If you decide to use a voucher whose value is higher than the total amount of books ordered, there will be no refund of the difference.

Vouchers are non-refundable and may not be converted to cash.

Shipping charges are calculated based on the delivery address and the total weight of the order. During the ordering process, after entering the delivery address and before accepting and completing the order, the shipping charges to be paid will be shown.

Yes. Shipping charges for exchanges/returns are paid by the customer, except when the received product(s) do not match your order or have printing defects.

In a case like this, contact us via email at livraria@lidel.pt (national orders) or depinternacional@lidel.pt (international orders), stating the problem and the order number.

No. In terms of content, used books are exactly like new books, but with the possible defects described above.

You need to fill in the form available in the Author Area. Your proposal will be analysed by our Editorial Department, which will later contact you.

The LIDEL Group is Portugal's leading editorial group for technical books, consisting of the publisher and distributor LIDEL and the publishers FCA, ETEP, PACTOR, fcadesign and LIDEL saúde e bem-estar. To know more about our Group, see About us.

The LIDEL Group is the largest Portuguese editorial group for technical books, comprising six specialised brands in distinct areas. To know all the thematic areas covered by the LIDEL Group, refer to the section Brands and Editorial Areas.

The ISBN (International Standard Book Number) is the exclusive number that identifies a given publication. You can find your book's ISBN book on the back cover next to the barcode. In case of eBooks, you can find the ISBN in the credits.