SELL UP · SIBILA PUBLISHING · ISBN 978-619-94282

SELL UP — Sibila Publishing and the sell-up.space platform

Sibila Publishing is the publishing arm of CYBILAS Ltd. — a registered publisher with the National ISBN Agency at the St. Cyril and St. Methodius National Library of Bulgaria. We publish textbooks, workbooks, research and applied titles in both print and electronic form. E-books are distributed through sell-up.space; printed editions through the publisher and partner bookshops.

Catalogue For authors Visit sell-up.space
An ISBN for every title Print and electronic editions Legal deposit with the National Library

What we publish

The publishing house carries the company's four activities — science, investments, consulting and training — into print and electronic form. Every title receives its own ISBN and is deposited under the Legal Deposit Act.

Textbooks and workbooks

Textbooks, workbooks and study aids for language and vocational training — standalone or as a set.

Research and applied titles

Reports, analyses, strategies and methodologies from applied and fundamental research.

Training materials

Learning content for the SKILL UP programmes and the skill-up.space platform.

Handbooks and project publications

Guides, handbooks and outputs of projects funded under national and European programmes.

Foreign-language training

Titles aligned with the Common European Framework of Reference for Languages (CEFR) — from level A1 upwards.

Print and electronic editions

Printed editions in softcover or hardcover, plus PDF and EPUB with instant download.

Catalogue

The first titles are due in November 2026. E-books are distributed through sell-up.space; printed editions through the publisher and partner bookshops.

Forthcoming · November 2026

Greek Language, Level A1 according to the Common European Framework of Reference for Languages. Textbook

Foreign-language training for officers of the General Directorate Border Police – Ministry of Interior. Published in Bulgarian.

Author
Dr Simeon Mihalkov
ISBN
978-619-94282-0-7
Format
E-book (PDF), first edition
Language
Bulgarian (with Greek material)
ISBN pending · November 2026

Greek Language, Level A1 according to the Common European Framework of Reference for Languages. Workbook

Companion material to the textbook — distributed as a set.

Author
Dr Simeon Mihalkov
Format
E-book (PDF), first edition
Language
Bulgarian (with Greek material)

Bibliographic data is also listed in the Bulgarian National Register of Published Books (booksinprint.bg).

For authors

We accept manuscripts for textbooks, study aids, research and applied titles. The publisher handles the whole path from manuscript to reader:

  1. 1

    Publishing agreement — clearly settled copyright, remuneration and term of the edition.

  2. 2

    ISBN and registration — an ISBN under the Sibila publisher prefix and an entry in the National Register of Published Books.

  3. 3

    Layout and cover — typesetting and visual design by the SKETCH UP division.

  4. 4

    Publication and legal deposit — release on sell-up.space and mandatory deposit with the National Library.

Propose a manuscript

Registration and legal framework

  • Publisher: CYBILAS Ltd. (СИБИЛАС ЕООД), UIC 208819078, Varna, Bulgaria — imprint "Sibila".
  • ISBN publisher identifier: 978-619-94282, assigned by the National ISBN Agency (National Library of Bulgaria).
  • Legal deposit: every title is deposited with the St. Cyril and St. Methodius National Library under the Bulgarian Legal Deposit Act.
  • Copyright: governed by a written publishing agreement under the Bulgarian Copyright and Neighbouring Rights Act.

Have a manuscript or an idea for a title?

office@cybilas.com · +359 88 746 1147 · Varna, Bulgaria

Contact us