Collection “Library of Prof. Boyan Penev – title pages” includes books and serials by the private library of the Bulgarian scientist Prof. Boyan Penev. This collection includes digitized title pages of Prof. Penev’s library containing handwritten inscriptions or personal signatures. The collection “Library of Prof. Boyan Penev” comprises 9 sub collections divided by the language of publications. Thus structured, the collection allows academic research on cultural and scientific contacts of Prof. Boyan Penev through his book preferences. Prof. Penev collection was officially presented in 2017 on the occasion of the 135th anniversary of his birth.