You can buy the books from Amazon if you click on the titles.

Title	Level	Publisher	ISBN
Aula Internacional - Nueva Edicion: Student's Book 1 with Exercises and CD - New Edition	Spanish A1i – A1ii	Difusión	978-8415846772
Aula Internacional - Nueva Edicion: Libro Del Alumno + Ejercicios + CD 2 (A2)	Spanish A2i – A2ii	Difusión	978-8415640103
Aula internacional 03 Libro del alumno + Audio-CD (mp3): Nueva edición	Spanish B1i – B1ii – B2	Difusión	978-3125157408
Aula Internacional - Nueva Edicion: Libro Del Alumno + Ejercicios + CD 4 (B2)	Spanish C1i	Difusión	978-8415620853
Le Nouveau Taxi!: Livre De L'eleve: Livre De L'eleve 1 & DVD-Rom	French A1i – A1ii	Hachette	978-2011555489
Le Nouveau Taxi!: Livre De L'eleve 2 & DVD-Rom	French A2i – A2ii	Hachette	978-2011555519
Foundations Italian 1 (Palgrave Foundation Series Languages)	Italian A1i – A1ii	Palgiare Macmilan	978-0-230-53782-8
Foundations Italian 2 (Palgrave Foundation Series Languages)	Italian A2i – A2ii	Palgrave Foundations	1-4039-3675-7
Japanese for Busy People: Kana [With CD (Audio)]: 1	Japanese A1i – A1ii – A2i – A2ii	AJALT	978-1568363851
Japanese for Busy People 2 Kana version (3rd edition)	Japanese B1i – B1ii	AJALT	ASIN: B01182PDU0
Portugues Xxi (Segundo O Novo Acordo Ortografico): Livro Do Aluno + CD 1 - Nova Edicao 2012	Portuguese A1i – A1ii – A2i	Lidel	978-9727579273
Chinese Made Easy: Workbook Level 1: Simplified Characters Version	Chinese A1i – A1ii	Joint Publishing 2006	978-9620425851
Studio D: Kurs- Und Arbeitsbuch A1	German A1i – A1ii	Cornelsen Verlag GmbH & Co	978-3464207079
Willkommen! 2 German Intermediate course: Coursebook	German A2i – A2ii	John Murray Learning (9 Mar. 2017)	978-1471805158
Mastering Arabic 1	Arabic A1i – A1ii	Palgrave	978-1-137-38044-9
Polski, Krok Po Kroku: Level A1: Coursebook for Learning Polish as a Foreign Language	Polish A1i – A1ii – A2i	Glossa Polish Language School (Editor)	978-8393073108
Hurra!!! Po Polsku: Student Textbook Vol. 2 (Book & CD)	Polish A2ii	Prolog Language School	978-8360229262