Support

Last updated: 8 October 2026

This site is operated by QUILLSTONE DIGITAL LLC, 1057 NW 136TH AVE, Miami, FL 33182, United States, trading as Studio Facile. You can reach us at info@studiofacilebook.com and we answer within 24 hours on working days.

Write to us

info@studiofacilebook.com — we answer within 24 hours on working days, in English.

The most common questions

“The email never arrived”

Check spam and promotions, and search for info@studiofacilebook.com. If it is not there, write to us with the email address you used and we resend it.

“Can I print it?”

Yes, as many times as you want, for yourself. The Tube Guide is made to be printed and kept on the tray, and the Practice Test has an answer sheet to print.

“Are these the real exam questions?”

No. The 150 questions were written for this material. They cover the topics the national certification exams ask about, but they are not official questions and we are not affiliated with any certifying body.

“My lab does it differently”

The books follow the CLSI standards and common US practice, and say so where laboratories differ. At work, your facility’s procedure manual always has the final word.

Refunds

See the refund policy.